Anti-war demonstrations take place in Berlin, Jena, Dresden and other German cities.

This French Army flying unit is composed mostly of American volunteers. Thirty-eight Americans serve in the Lafayette Escadrille and are credited with 57 victories.

German troops begin to round up Belgian workers for deportation to Germany. They are assembled in daily batches of 1,400 men and women in equal numbers.

Marie Curie helps to equip ambulances with X-ray equipment so wounded soldiers at the front can receive immediate care.

The German code name for the attack in the Meuse region of France (toward the direction of Verdun) is Gericht, ‘place of execution.’ Verdun becomes the symbol of France’s...

British nurse Edith Cavell, a nursing instructor working with the Red Cross, is shot by Germans at 7 a.m. under accusations of being a spy and helping Allied soldiers escape Belgium. She was charged...

The former Czar Nicholas II, his wife and children, are shot by Bolsheviks at Ekaterinburg.

The Central Powers troops cross the Danube River and within days capture Belgrade. A massive Serbian retreat follows. Soldiers and their families made their way to the Albanian border through...

British and Indian forces move up the Tigris River to capture Kut-al-Amara in Mesopotamia from Turkish forces. Their ultimate goal is Baghdad, roughly 100 miles from present-day Baghdad in Iraq. ...