More than 2286 nurses served overseas.

US entered the war on April 6, 1917.

80,000 British troops suffered from shell-shock from the trauma of the battle.

The most widely reported and, perhaps, the most effective gas of the First World War was mustard gas.

Germans were the first to use flamethrowers in WWI. Their flamethrowers could fire jets of flame as far as 130 feet.

During WWI, dogs were used as messengers and carried orders to the front lines in capsules attached to their bodies.

Tanks were initially called “landships.” However, in an attempt to disguise them as water storage tanks rather than as weapons, the British decided to code name them “tanks.”

The most successful fighter of the entire war was Rittmeister von Richthofen (1892-1918). He shot down 80 planes, more than any other WWI pilot.

WWI helped bring about the emancipation of women. Women took over many traditionally male jobs and showed that they could perform them just as well as men.

More than 200,000 African Americans served in WWI, but only about 11 percent of them were in combat forces. The rest were put in labor units, loading cargo, building roads, and digging ditches.

During WWI, the Germans released about 68,000 tons of gas, and the British and French released 51,000 tons. In total, 1,200,000 soldiers on both sides were gassed, of which 91,198 died horrible deaths

British tanks were initially categorized into “males” and “females.” Male tanks had cannons, while females had heavy machine guns.

The U.S. was in the war in actual combat for only seven and a half months. During this time 116,000 were killed and 204,000 were wounded.

Romania officially made peace with the Central Powers by signing the Treaty of Bucharest on 7 May 1918.

During WWI, the Spanish flu caused about 1/3 of total military deaths.

To increase the size of the U.S. Army during WWI, Congress passed the Selective Service Act, which was also known as the conscription or draft, in May 1917.

Early trenches were little more than foxholes or ditches, intended to provide a measure of protection during short battles.

Woodrow Wilson (1856-1924), the 28th U.S. president, served in office and led America through World War I (1914-1918).

The Treaty of Versailles was signed on June 28, 1919, between the Allied and Associated Powers on the one hand and Germany on the other, brought World War I to an end.

On December 24, 1814, The Treaty of Ghent was signed by British and American representatives at Ghent, Belgium, ending the War of 1812.

World War 1 was triggered on 28 June 1914 by the assassination of the Archduke Franz Ferdinand of Austria and his pregnant wife Sophie

The sinking of the Lusitania in 1915 bought the US into the war.

58,000 British soldiers were lost on the first day at the Battle of the Somme.

Other names for World War 1 include 'The War to End All Wars', The War of the Nations and 'The Great War."

Battle of Verdun, 1916, resulted in over a million casualties in ten months