Second Battle of the Aisne

Date: April 16, 1917 • Location: Vailly-sur-Aisne, France

World War I: Several French army corps began a massive assault against the German-occupied Chemin des Dames ridge, south of Laon, France.

World War I, or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. One of the deadliest conflicts in history, World War I caused 15 to 22 million deaths, including those resulting from war crimes and genocides. The war also contributed to the spread of the Spanish flu pandemic. The conflict saw important developments in weaponry, including machine guns, artillery, aircraft, chemical weapons, and tanks.