World War I

World War I (or the First World War) was a conflict that was fought on Earth in the early 20th century between Germany and Austria-Hungary, and Great Britain, France, and the United States of America.

The conflict began in 1914 and finally ended in 1918 with the defeat of Germany and her allies. Following the end of the war, the Germans became shamed by their defeat, and this was one of the contributing factors for a second global conflict in 1939. (TOS novel: My Brother's Keeper: "Republic").