The American Civil War is the conflict with the largest number of American military fatalities in history. In fact, the Civil War's death toll is comparable to all other major wars combined, the deadliest of which were the World Wars, which have a combined death toll of more than 520,000 American fatalities. The ongoing series of conflicts and interventions in the Middle East and North Africa, collectively referred to as the War on Terror in the west, has a combined death toll of more than 7,000 for the U.S. military since 2001. Other records In terms of the number of deaths per day, the American Civil War is still at the top, with an average of 425 deaths per day, while the First and Second World Wars have averages of roughly 100 and 200 fatalities per day respectively. Technically, the costliest battle in U.S. military history was the Battle of Elsenborn Ridge, which was a part of the Battle of the Bulge in the Second World War, and saw upwards of 5,000 deaths over 10 days. However, the Battle of Gettysburg had more military fatalities of American soldiers, with almost 3,200 Union deaths and over 3,900 Confederate deaths, giving a combined total of more than 7,000. The Battle of Antietam is viewed as the bloodiest day in American military history, with over 3,600 combined fatalities and almost 23,000 total casualties on September 17, 1862. Revised Civil War figures For more than a century, the total death toll of the American Civil War was generally accepted to be around 620,000, a number which was first proposed by Union historians William F. Fox and Thomas L. Livermore in 1888. This number was calculated by using enlistment figures, battle reports, and census data, however many prominent historians since then have thought the number should be higher. In 2011, historian J. David Hacker conducted further investigations and claimed that the number was closer to 750,000 (and possibly as high as 850,000). While many Civil War historians agree that this is possible, and even likely, obtaining consistently accurate figures has proven to be impossible until now; both sides were poor at keeping detailed records throughout the war, and much of the Confederacy's records were lost by the war's end. Many Confederate widows also did not register their husbands death with the authorities, as they would have then been ineligible for benefits.

Estimates for the total death count of the Second World War generally range somewhere between 70 and 85 million people. The Soviet Union suffered the highest number of fatalities of any single nation, with estimates mostly falling between 22 and 27 million deaths. China then suffered the second greatest, at around 20 million, although these figures are less certain and often overlap with the Chinese Civil War. Over 80 percent of all deaths were of those from Allied countries, and the majority of these were civilians. In contrast, 15 to 20 percent were among the Axis powers, and the majority of these were military deaths, as shown in the death ratios of Germany and Japan. Civilian deaths and atrocities It is believed that 60 to 67 percent of all deaths were civilian fatalities, largely resulting from war-related famine or disease, and war crimes or atrocities. Systematic genocide, extermination campaigns, and forced labor, particularly by the Germans, Japanese, and Soviets, led to the deaths of millions. In this regard, Nazi activities alone resulted in 17 million deaths, including six million Jews in what is now known as The Holocaust. Not only was the scale of the conflict larger than any that had come before, but the nature of and reasoning behind this loss make the Second World War stand out as one of the most devastating and cruelest conflicts in history. Problems with these statistics Although the war is considered by many to be the defining event of the 20th century, exact figures for death tolls have proven impossible to determine, for a variety of reasons. Countries such as the U.S. have fairly consistent estimates due to preserved military records and comparatively few civilian casualties, although figures still vary by source. For most of Europe, records are less accurate. Border fluctuations and the upheaval of the interwar period mean that pre-war records were already poor or non-existent for many regions. The rapid and chaotic nature of the war then meant that deaths could not be accurately recorded at the time, and mass displacement or forced relocation resulted in the deaths of many civilians outside of their homeland, which makes country-specific figures more difficult to find. Early estimates of the war’s fatalities were also taken at face value and formed the basis of many historical works; these were often very inaccurate, but the validity of the source means that the figures continue to be cited today, despite contrary evidence.

In comparison to Europe, estimate ranges are often greater across Asia, where populations were larger but pre-war data was in short supply. Many of the Asian countries with high death tolls were European colonies, and the actions of authorities in the metropoles, such as the diversion of resources from Asia to Europe, led to millions of deaths through famine and disease. Additionally, over one million African soldiers were drafted into Europe’s armies during the war, yet individual statistics are unavailable for most of these colonies or successor states (notably Algeria and Libya). Thousands of Asian and African military deaths went unrecorded or are included with European or Japanese figures, and there are no reliable figures for deaths of millions from countries across North Africa or East Asia. Additionally, many concentration camp records were destroyed, and such records in Africa and Asia were even sparser than in Europe. While the Second World War is one of the most studied academic topics of the past century, it is unlikely that we will ever have a clear number for the lives lost in the conflict.

The First World War saw the mobilization of more than 65 million soldiers, and the deaths of almost 15 million soldiers and civilians combined. Approximately 8.8 million of these deaths were of military personnel, while six million civilians died as a direct result of the war; mostly through hunger, disease and genocide. The German army suffered the highest number of military losses, totaling at more than two million men. Turkey had the highest civilian death count, largely due to the mass extermination of Armenians, as well as Greeks and Assyrians. Varying estimates suggest that Russia may have suffered the highest number of military and total fatalities in the First World War. However, this is complicated by the subsequent Russian Civil War and Russia's total specific to the First World War remains unclear to this day.

Proportional deaths In 1914, Central and Eastern Europe was largely divided between the empires of Austria-Hungary, Germany and Russia, while the smaller Balkan states had only emerged in prior decades with the decline of the Ottoman Empire. For these reasons, the major powers in the east were able to mobilize millions of men from across their territories, as Britain and France did with their own overseas colonies, and were able to utilize their superior manpower to rotate and replace soldiers, whereas smaller nations did not have this luxury. For example, total military losses for Romania and Serbia are around 12 percent of Germany's total military losses; however, as a share of their total mobilized forces these countries lost roughly 33 percent of their armies, compared to Germany's 15 percent mortality rate. The average mortality rate of all deployed soldiers in the war was around 14 percent.

Unclarity in the totals Despite ending over a century ago, the total number of deaths resulting from the First World War remains unclear. The impact of the Influenza pandemic of 1918, as well as various classifications of when or why fatalities occurred, has resulted in varying totals with differences ranging in the millions. Parallel conflicts, particularly the Russian Civil War, have also made it extremely difficult to define which conflicts the fatalities should be attributed to. Since 2012, the totals given by Hirschfeld et al in Brill's Encyclopedia of the First World War have been viewed by many in the historical community as the most reliable figures on the subject.

Between 2003 and 2024, the annual number of civilian deaths due to the Iraq war has fluctuated significantly. As of July, there were 210 deaths in 2024. Civilian Deaths in the Iraq WarCivilian casualties are the deaths of non-military individuals as a result of military operations. The number of documented civilian deaths in the Iraq war peaked in 2006 at 29,526 casualties. Since then, the number had fallen to 4,162 casualties documented in the year 2011, and the number of casualties has been decreasing again since 2014. Due to the nature of the Iraq war and of war reporting, data cannot be considered exact. Many civilian deaths that occurred during the war in Iraq may remain unaccounted for. The Iraq war was launched in March 2003 upon the invasion of Iraq by U.S. forces. Eight years later, in December 2011, the U.S. formally declared an end to the Iraq war. From the start of the war in 2003 until September 30, 2015, it is estimated that the United States spent a total of over 819 billion US dollars on war costs in Iraq. This number includes funding requested by the President and appropriated by Congress, and accounts for both military and non-military spending. Spending was highest in 2008, that year over 142 billion US dollars were spent in Iraq by the United States government. As of 2022, around 6,561 U.S. active-duty military personnel were deployed in North Africa, the Near East, and South Asia. The number of US American soldiers killed in Iraq peaked in 2007 with just over nine hundred causalities. In the same year, there were over 25,000 civilian deaths in Iraq.

The 20th century marked a new trend in the recording of war fatalities, where more attention was given to the impact of conflicts on civilian populations, and not just the military. During the Second World War, the extent of the atrocities committed, the large-scale bombing campaigns, and the various famines resulting from the war meant that the scope of the civilian death toll took place was unprecedented - the likes of which had never been seen before, or since. Almost two thirds of all deaths due to the Second World War were of civilians, yet the ratio of military to civilian deaths varied greatly by country. Many British dominions and the United States suffered little to no civilian deaths as they were not located in an active theater of war - civilian fatalities largely came from naval or aerial attacks (such as at Pearl Harbor). In contrast, there were several European colonies in the Asia-Pacific region where all, or at least 95 percent, of total fatalities were among civilians - some of these regions suffered millions of deaths due to famine and atrocities.

The Office of the United Nations High Commissioner for Human Rights (OHCHR) verified a total of 41,783 civilian casualties during Russia's invasion of Ukraine as of January 31, 2025. Of them, 29,178 people were reported to have been injured. However, OHCHR specified that the real numbers could be higher. How many people have died during the war in Ukraine? OHCHR has estimated the number of deaths of civilians, or non-armed individuals, in Ukraine at 12,605 since the start of the war on February 24, 2022. The highest death toll was recorded in March 2022, at over 3,900. The figures on soldier deaths are reported by Russia and Ukraine’s governmental authorities, but they cannot be verified at this point and thus need to be taken with caution. Conflict-related deaths in Ukraine from 2014 to 2021 After Russia annexed Crimea in 2014, Ukraine has seen a military conflict between the government and the Russia-supported separatist regions of Donetsk and Luhansk. OHCHR estimates that between 14,200 and 14,400 people, including civilians and military personnel, were killed in relation to that conflict from April 14, 2014, to December 31, 2021. Of them, at least 3,400 were civilians.

The United States military entered the Korean War in July 1950 and fought on the side of South Korea against the communist forces of North Korea and the People's Republic of China until August 1953. In total, the United States military would suffer almost 37,000 deaths through hostilities. Of these, servicemembers in the Army made up the vast majority of deaths (82.19 percent), with most of these being the result of soldiers being killed in action. A smaller number of marines and navy servicemembers were killed in Korea, with the majority also having been killed in action for these groups. For the United States Air Force, the composition of total deaths is quite different, as the majority of pilots killed during the conflict were declared dead after going missing in action. This likely reflects the fact that when an airplane was shot from the sky in battle, the remains of the pilots are not recoverable.

The Korean War began on June 25, 1950, and ended on July 27, 1953, with an armistice. The “War of June 25” started with an invasion by North Korea and claimed around 1.9 million military casualties, including 815 thousand fatalities. This does not even consider the millions of civilians killed or forced to flee from their homes. Throughout the war, North Korea gained control of almost all of South Korea before South Korean and United Nations forces pushed north to regain control. Nearly all regions and people were affected at some point, with massive destruction everywhere. The unfinished warThe Korean War was the largest international war following the Second World War and one of the few conflicts during the Cold War. The United Nations forces, largely composed of American troops, fought alongside South Korea, while Chinese and Soviet troops supported North Korea. The Korean War unofficially ended with an armistice. This was to be followed by a formal treaty to end the war, but this never happened. Officially, North and South Korea are still at war today. Divided familiesThe Korean War resulted in millions of dead, missing, abducted, and refugee civilians. Over a million North Koreans fled south of the border. The war tore many families apart. Following the inter-Korean summit in 2000, the two governments arranged for family reunions in North Korea. North Korea would not permit the people to leave, so the family members in the south went to meet them. From 2000 to 2023, about 21 reunions have taken place in North Korea. Most of the family members in South Korea are now in their 70s to 90s. Although there is substantial agreement on the need to continue these reunions before the separate families age and pass away, this has not always been possible due to tensions between the two Koreas.

Civilians have become the main victims of armed violence in Mexico, more specifically, of the ongoing drug war or guerra contra el narcotráfico. Since 2007, at least of 6,152 civilians have been killed in confrontations between the armed forces and criminal groups, in stark contrast with the death of at least 423 members of the armed forces registered in the same time period. 2011 was the deadliest year for civilians, as 1,324 such people lost their lives to this war.

The Korean War was an international military conflict which lasted from June 1950 until July 1953, which pitted the communist forces of North Korea, the Soviet Union, and the People's Republic of China against South Korea and a U.S.-led UN force comprised of troops from over 20 additional countries. The war was the United States' first major military engagement of the Cold War, the period of rivalry and heightened tension between the world's two superpowers, the U.S. and Soviet Union. While the war was one of the deadliest in the Cold War and the 20th century in general, it resulted in a stalemate between the North and South, with the boundary between the two countries remaining to this day at the 38th parallel line. The two countries remain technically at war to the present day, as the South's dictator, Syngman Rhee, refused to sign the peace agreement which in practice ended the fighting in the war.

U.S. military deaths in Korea

The majority of U.S. military fatalities during the Korean War were battle deaths (63 percent), with a smaller number of deaths while missing (12 percent), deaths while captured (eight percent), or deaths from battle wounds (seven percent). In addition, around three percent of deaths were from airplane crashes which were not caused by hostile forces, with another seven percent dying of other causes unrelated to battle. In total around 36,000 U.S. military servicemembers were killed in Korea, out of a total of around 40,000 deaths for the UN forces combined. The war was the United States' second deadliest conflict of the Cold War, as well as its fifth deadliest ever, after the Vietnam War, World War I, World War II, and the Civil War.

In 2023 there was one operational death in the British Armed Forces, the same number as in 2022 and 2021. Since 1945, the deadliest year for British Armed forces was 1951, when there were 851 operational deaths. This was due to three separate conflicts: the Malayan Emergency, the 1951 Anglo-Egyptian War and the Korean War. Between 1959 and 2009 there were only three years that had more than 100 operational deaths: 1972, 1973 and 1982. The spike in deaths in the early 1970s were the result of the political violence in Northern Ireland at the time, and 237 of the 297 deaths in 1982 happened during the Falklands War. Over this period, there have been a total of 7,193 British military deaths in conflicts. Size of armed forces at a historic low in 2023 The British Armed Forces are composed of four separate branches, the British Army, the Royal Navy, the Royal Air Force and the Royal Marines. Of these branches, the British Army has more personnel than the other three combined at 77,540. The Royal Air Force had 32,180 personnel, the Navy 26,330, and the Marines 6,510 amounting to 142,560 active personnel. This was the fewest number of personnel in modern times, and is partly explained by modernization efforts, which sought to de-emphasize the importance of a large army based on manpower in favor of a more advanced one based on technology. Long-term defense cuts   These cutbacks in personnel are also a result of the UK government spending far less on defense than it used to. In 1984, for example the UK spent around 5.5 percent of GDP on defense, compared with just 2.3 percent in 2021. The end of the Cold War in the early 1990s made it difficult to justify 1980s-levels of military spending during this time period, along with the UK having far fewer overseas commitments than in the past. Russia's full-scale invasion of Ukraine in 2022, however, may reverse this trend, with many NATO allies pledging to increase their defense budgets in light of the new geopolitical situation. This particular issue will become even more pertinent if Donald Trump, a known skeptic of NATO, is elected as U.S. President in November 2024.

The United States military has a long history of ethnic minorities serving in its ranks, with black Americans having served as far back as the Revolutionary War. The Vietnam War took place during a period of changing race relations in the United States, with the Civil Rights Movement reaching its peak in the mid-1960s, and this too was reflected in the military. The Vietnam War was the first major conflict in which black and white troops were not formally segregated, however, discrimination did still occur with black soldiers reporting being subject to overt racism, being unjustly punished, and having fewer promotion opportunities than their white counterparts.

In the early phases of the war, black casualty rates were much higher than for other races and ethnicities, with some reports showing that black soldiers accounted for 25 percent of the casualties recorded in 1965. This declined substantially as the war progressed, however, the proportion of black service personnel among those fallen during the war was still disproportionately high, as black personnel comprised only 11 percent of the military during this era. A smaller number of other ethnic minorities were killed during the war, comprising two percent of the total.

Throughout the period in which the United States was in an armed conflict with the Communist-led government and insurgency in Vietnam (referred to as the "Vietnam War" in the U.S. and the "Resistance War against the United States" in Vietnam), around 40 percent of the 8.7 million U.S. military service personnel were stationed in South-East Asia. Of these personnel in the theatre of war, around two percent were killed during the conflict.

This war was part of the wider Cold War of the second half of the 20th century, where the rivalry between the superpowers of the United States and Soviet Union dominated the post-World War II era. During this period the U.S. stationed much of its remaining five million service personnel outside of active conflict zones, especially in strategically important countries such as (West) Germany, South Korea, and Japan, in addition to those stationed at home.

The number of soldiers killed in Afghanistan in 2021 amounted to 13 from the Western coalition, as of October 2021. Operation Enduring Freedom (OEF) is a large military operation, being carried out within the framework of the War on Terror.

Afghanistan War

As mentioned above, Operation Enduring Freedom in Afghanistan, which began in October 7, 2001, caused the deaths of many soldiers during the period from 2001 to 2020. Operation Enduring Freedom is an American term for the Afghanistan War, used by the U.S. government.

Operation Enduring Freedom was a response to the terror attacks on the World Trade Center and the Pentagon on September 11, 2001 and the beginning of the Global War on Terrorism.

Although it has been nearly 20 years since the Americans started the Global War on Terror, there are still many terrorist attacks in Afghanistan. About 1,750 terrorist attacks were counted in the country 2019.

Due to terrorism in Afghanistan, the number of deaths has increased from 1,952 killed people in 2007 up to 5,312 killed people in 2015 by terrorists. In 2019, the number stood at 8,681.

As of March 2021, 11 U.S. soldiers died in Iraq in 2020. This is a decrease from a peak of 904 casualties in 2007.

Additional information on fatalities in the Iraq War

The invasion of Iraq by the United States and coalition forces in March 2003 saw the beginning of the Iraq War, a conflict that would continue beyond the end of the decade. Fatalities of American forces were highest in the first five years of conflict as soldiers grappled with the Al Qaeda as well as civil war between those groups seeking to fill the power vacuum left by the removal of Iraqi leader Saddam Hussein. Casualties progressively decreased from 2008, in part due to attempts by Barack Obama who made the removal of troops from Iraq a central promise of this successful campaign to succeed George W. Bush. In 2013, the majority of Americans considered sending troops to fight in Iraq to be a mistake.

While the number of civilian deaths in the Iraq War was much higher, the trend of numbers decreasing from 2008 onward was in line with the trend for American solider losses. However, civilian deaths rose again from 2013 onward as Iraq returned to heavy conflict with Islamic State.

The high number of American fatalities in the first five years of the Iraq War could be seen as influencing the reluctance of the United States to commit ground troop support in the battle against Islamic State when the issue was discussed in 2015. Not only is the loss of life a tragedy in itself, but the political discourse in the United States surrounding the involvement of their troops in Middle Eastern conflicts has made further involvement unattractive to elected officials. However calls for further ground support are likely to continue as Iraq remained in the top five countries with the most terrorist attacks as of 2019.

Although the Japanese invasion of China, known as the Second Sino-Japanese War, lasted for more than eight years, it was the battle against the United States and local defenses for control of the Philippines that resulted in the largest share of Japan's military losses in the Second World War. The Japanese invasion of the Philippines began on December 8, 1941, on the same day as the attack on Pearl Harbor. The Japanese were able to take de facto control of the region by May 1942. Japan faced strong, underground resistance from locals in the two years that followed, until the U.S. military began its counteroffensive in the Leyte Gulf in October 1944, which continued until the war's end. Around 420,000 of the 490,000 Japanese deaths in the Philippines occurred during the Second Philippines Campaign (after Oct. 1944), although some estimates suggest that up to 80 percent of these deaths were due to starvation and malnutrition, as the Japanese supply lines became overstretched in the war's latter phase and failed to provide sufficient food and medicine to its forces.

The Empire of Japan's military losses in the Second World War are estimated to exceed 2.5 million men. For Japan, the costliest front in the Pacific theater was the battle against the United States in the Philippines, closely followed by its invasion of China, known as the Second Sino-Japanese War. After 1941, the Imperial Japanese Army was simultaneously stretched across several frontlines in the Pacific theater, and this was one contributing factor to their eventual defeat as reinforcing and supplying various armies across these fronts was unfeasible in the long-term.

It is estimated that the Second World War was responsible for the deaths of approximately 3.76 percent of the world's population between 1939 and 1945. In 2022, where the world's population reached eight billion, this would be equal to the death of around 300 million people.

The region that experienced the largest loss of life relative to its population was the South Seas Mandate - these were former-German territories given to the Empire of Japan through the Treaty of Versailles following WWI, and they make up much of the present-day countries of the Marshall Islands, Micronesia, the Northern Mariana Islands (U.S. territory), and Palau. Due to the location and strategic importance of these islands, they were used by the Japanese as launching pads for their attacks on Pearl Harbor and in the South Pacific, while they were also taken as part of the Allies' island-hopping strategy in their counteroffensive against Japan. This came at a heavy cost for the local populations, a large share of whom were Japanese settlers who had moved there in the 1920s and 1930s. Exact figures for both pre-war populations and wartime losses fluctuate by source, however civilian losses in these islands were extremely high as the Japanese defenses resorted to more extreme measures in the war's final phase.

This statistic shows the number of UK military and civilian casualties in the Iraq War, which lasted from March 20, 2003 to December 18, 2011. Throughout the entire conflict, there were 178 British fatalities, with the 2003, the first year of the conflict being the deadliest one.

The statistics shows the average number of civilian deaths per day by car bombs and suicide attacks in Iraq war from 2003 to 2013*. As of January 19, 2013, there were an average of 6.4 civilian deaths per day caused by suicide attacks and car bombs in 2013. Iraq war The Iraq war was launched in March 2003 upon the invasion of Iraq by U.S. forces. Eight years later, in December 2011, the US formally declared and end to the Iraq war.

According to the survey among U.S. citizens, which was conducted by Gallup in March 2013, ten years after the invasion of Iraq, 53 percent of the participants stated that the Iraq War was a mistake.

Civilian casualties are the deaths of non-military individuals as a result of military operations. Due to the data from Iraqbodycount.org, 29 thousand civilian deaths were documented in 2006. Many of these fatalities were caused by car bombs and suicide attacks. The average number of civilian deaths per day due to these methods culminated in 2007 with 22 people killed per day.

Not only civilian casualties can be counted during the Iraq War, many American soldiers lost their lives in the Iraq War. In 2007, 904 U.S. soldier’s deaths were reported in Iraq.