First Battle of Passchendaele

Date: October 12, 1917 • Location: Zonnebeke, Belgium

First World War: New Zealand troops suffered more than 2,000 casualties, including more than 800 deaths, in the First Battle of Passchendaele, making it the nation's largest loss of life in one day.

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.