World War I or the First World War, often abbreviated as WWI or WW1, and referred to by some Anglophone authors as the "Great War" or the "War to End All Wars", was a global conflict which lasted from 1914 to 1918, and is considered one of the deadliest conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fighting occurring throughout Europe, the Middle East, Africa, the Pacific, and parts of Asia. An estimated 9 million soldiers were killed in combat, plus another 23 million wounded, while 5 million civilians died as a result of military action, hunger, and disease. Millions more died in genocides within the Ottoman Empire and in the 1918 influenza pandemic, which was exacerbated by the movement of combatants durin