U-Boat. Ace. Tailspin. Strafe. Ration. Shrapnel. Camouflage. Tank. Attrition. Trench Coat. Lost Generation. These and more are included in the OED's special feature: "One Hundred Words that Define the First World War."
World War One, or the Great War, began on July 28, 1914, 100 years ago. Click through the illustrated timeline for images, definitions, and quotations.