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.

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.

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.

The First Battle of the Somme is acknowledged as one of the most devastating and bloodiest battles of all time. The battle took place during the First World War, between allied British and French forces and opposing German forces, from July 1 to November 18, 1916. Initially this attack was supposed to be led by the French army, however their focus changed to the Battle of Verdun, where they were locked in a deadly stalemate against the German forces, therefore the role of the British changed from support to that of the lead. After a week of heavy bombardment from British artillery, on the morning of July 1, 1916 over 100,000 British troops charged the enemy lines, in what would become the bloodiest day in the history of the British Army. The German trenches were dug so deeply that the artillery fire did not have its desired effect, and it failed to sufficiently clear much of the barbed wire, meaning that the German machine guns were able to mow down thousands of oncoming troops as they tried to rush across no mans land. By the end of the day, the British troops secured approximately eight square kilometers of ground, along a front that stretched 24km (averaging just 0.33km from the initial line of attack), at a cost of over 57,000 casualties, including over 19,000 fatalities. By comparison, the German and French armies were of relatively similar sizes, however their fatality rate was much lower.

Progress was slow

The first day set much of the tone for the remainder of the battle. The German forces were able to retreat and dig new trenches and form their defenses faster than the British and French could mobilize their attacks, meaning that progress was slow, and cost many many lives. The majority of casualties to British and French forces came from German machine gun fire. While the Battle of the Somme is justly regarded as the prime example of trench warfare, it is also important to note that the respective air forces did play a large part in gathering intel and coordinating attacks, as well as the artillery regiments who provided much of the suppressing fire and disrupted one another's supply chains. September 15th also marked the first ever use of a tank in battle, where the British sent a small fleet of tanks into the field, with mixed results.

Legacy of the Somme

By the end of the battle the casualties were high. As the battle progressed the French became more heavily involved, and German soldiers began falling more rapidly. The battle ended on November 18th 1916, with well over one million casualties and 300,000 fatalities. Although casualties were high for all sides, the battle is most prominently remembered in Britain and the Commonwealth as an example of the ultimate sacrifice made by the men who served throughout the First World War.

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.

In the Somme department of France during the First World War, British forces suffered the highest number of fatalities per day during the period of the First Battle of the Somme in 1916. Over this period, which lasted for almost four months and three weeks, British forces suffered almost 128 thousand fatalities; which translates into an average of 893 deaths per day. In total, the British army suffered almost 207 thousand fatalities, with an average of 177 deaths per day; although the most intense periods came in the second half of 1916 and between March and September 1918 (which also included the Second Battle of the Somme)

Parts II and III of the Treaty of Versailles dealt with Germany's territorial losses as a result of the First World War. In mainland Europe, Germany's borders shrank, reducing the country's size by approximately 65,000 square kilometers, and roughly 7 million people (13 and 12 percent of their respective totals).The loss of all of this territory also meant that Germany's industrial and agricultural output was drastically affected, particularly iron output, of which Germany lost 48%.

Loss of territory in Europe

In Europe, Germany seceded territory to seven countries in total, including Czechoslovakia, Lithuania and Poland, none of which existed as independent states before the First World War. Poland was given a "route to the sea" that separated Eastern Prussia from the rest of Germany, and this "route" also included Danzig (Gdańsk), which was made a "free city" under the League of Nations' administration. The area of Alsace-Lorraine was annexed by France, who Germany had taken it from in 1870, and the coal-rich area of the Saar (Saarland) was under a French-led League of Nations control. Smaller areas were also ceded to other neighboring nations, which meant that millions of ethnic Germans became minorities overnight. In addition to changing borders, five of Germany's major rivers were made international, and were regulated by international committees, of which German representatives never made a majority.

The end of the Second Reich

Part IV of the Treaty of Versailles stripped Germany of all overseas possessions, and distributed them primarily between Britain and France as League of Nations mandates (along with all former Ottoman territories). This meant that Germany lost vast amounts of land in Africa (over 4.5 million square kilometers; also linking several of Britain's colonies, which now stretched continuously from Egypt to South Africa), as well as all Asian and Pacific colonies (over 250,000 square kilometers), bringing an end to Germany's overseas empire.

In 1800, the region of Germany was not a single, unified nation, but a collection of decentralized, independent states, bound together as part of the Holy Roman Empire. This empire was dissolved, however, in 1806, during the Revolutionary and Napoleonic eras in Europe, and the German Confederation was established in 1815. Napoleonic reforms led to the abolition of serfdom, extension of voting rights to property-owners, and an overall increase in living standards. The population grew throughout the remainder of the century, as improvements in sanitation and medicine (namely, mandatory vaccination policies) saw child mortality rates fall in later decades. As Germany industrialized and the economy grew, so too did the argument for nationhood; calls for pan-Germanism (the unification of all German-speaking lands) grew more popular among the lower classes in the mid-1800s, especially following the revolutions of 1948-49. In contrast, industrialization and poor harvests also saw high unemployment in rural regions, which led to waves of mass migration, particularly to the U.S.. In 1886, the Austro-Prussian War united northern Germany under a new Confederation, while the remaining German states (excluding Austria and Switzerland) joined following the Franco-Prussian War in 1871; this established the German Empire, under the Prussian leadership of Emperor Wilhelm I and Chancellor Otto von Bismarck. 1871 to 1945 - Unification to the Second World War The first decades of unification saw Germany rise to become one of Europe's strongest and most advanced nations, and challenge other world powers on an international scale, establishing colonies in Africa and the Pacific. These endeavors were cut short, however, when the Austro-Hungarian heir apparent was assassinated in Sarajevo; Germany promised a "blank check" of support for Austria's retaliation, who subsequently declared war on Serbia and set the First World War in motion. Viewed as the strongest of the Central Powers, Germany mobilized over 11 million men throughout the war, and its army fought in all theaters. As the war progressed, both the military and civilian populations grew increasingly weakened due to malnutrition, as Germany's resources became stretched. By the war's end in 1918, Germany suffered over 2 million civilian and military deaths due to conflict, and several hundred thousand more during the accompanying influenza pandemic. Mass displacement and the restructuring of Europe's borders through the Treaty of Versailles saw the population drop by several million more.

Reparations and economic mismanagement also financially crippled Germany and led to bitter indignation among many Germans in the interwar period; something that was exploited by Adolf Hitler on his rise to power. Reckless printing of money caused hyperinflation in 1923, when the currency became so worthless that basic items were priced at trillions of Marks; the introduction of the Rentenmark then stabilized the economy before the Great Depression of 1929 sent it back into dramatic decline. When Hitler became Chancellor of Germany in 1933, the Nazi government disregarded the Treaty of Versailles' restrictions and Germany rose once more to become an emerging superpower. Hitler's desire for territorial expansion into eastern Europe and the creation of an ethnically-homogenous German empire then led to the invasion of Poland in 1939, which is considered the beginning of the Second World War in Europe. Again, almost every aspect of German life contributed to the war effort, and more than 13 million men were mobilized. After six years of war, and over seven million German deaths, the Axis powers were defeated and Germany was divided into four zones administered by France, the Soviet Union, the UK, and the U.S.. Mass displacement, shifting borders, and the relocation of peoples based on ethnicity also greatly affected the population during this time. 1945 to 2020 - Partition and Reunification In the late 1940s, cold war tensions led to two distinct states emerging in Germany; the Soviet-controlled east became the communist German Democratic Republic (DDR), and the three western zones merged to form the democratic Federal Republic of Germany. Additionally, Berlin was split in a similar fashion, although its location deep inside DDR territory created series of problems and opportunities for the those on either side. Life quickly changed depending on which side of the border one lived. Within a decade, rapid economic recovery saw West Germany become western Europe's strongest economy and a key international player. In the east, living standards were much lower, although unemployment was almost non-existent; internationally, East Germany was the strongest economy in the Eastern Bloc (after the USSR), though it eventually fell behind the West by the 1970s. The restriction of movement between the two states also led to labor shortages in the West, and an influx of migrants from...

This graph shows the total number of artillery and heavy guns used by the British forces during the First Battle of the Somme in 1916. The Battle of the Somme took place from July 1, until November 18, 1916 with most of the bombardments coming in the week leading up to the July 1, attack. The front line during the battle was over 22km long, and the German forces were so well entrenched (up to 15m deep) and protected that the week-long bombardment did not have its desired effect. This meant that when the soldiers rushed the German lines on the morning of July 1, they suffered massive casualties, with 19,240 British fatalities on the first day alone (making it the bloodiest day in British military history).

The most commonly used gun was by far the 18PDR field gun,of which 808 were deployed during the Battle of the Somme. This gun was the most frequently used field gun used by the British Royal Field Artillery in the First World War. After these were the 4.5- and 6-inch Howitzers, and the 60 pounder guns. There was also a smaller number of naval railway-guns used to provide heavier fire and strategically targeted enemy roads and railways in order to disrupt their supply chain. The smaller guns and Howitzers were used not only to bombard the enemy, but also to destroy the masses of barbed wire that occupied no-mans-land and to clear a path for the soldiers (although this was not always very effective).

Heroes of the Great War Indexing Project - over 17,000 references to notices published in the South Australian newspaper The Chronicle between 1915 and 1919 under various headings including 'Heroes of the Great War', 'Heroes of the Empire', 'Died on Active Service' and ‘Biographical’. The notices were placed by relatives and friends of World War I service personnel who died, or were wounded, or were decorated. Some newspaper printing errors have been corrected using official sources.\r This is a subset of the Heroes of the Great War data limited to those entries (3062) that contain a portrait. \r Data set also includes the reference (date, page and column) within The Chronicle, brief biographical details including name, age, rank, battalion and occasionally place of death. Also included are names of relatives and place of residence in South Australia by street address, suburb or town.\r For the full data set, see Heroes of the Great War Chronicle Newspaper 1915-1919.\r