There was the Pacific Campaign against Japan, by the United States. Then there was the European Campaign against Hitler and his European ally by the United States, Soviet Russia, Great Britain and their allies.
World War II was the deadliest conflict in world history. There were anywhere from 44-46 million military losses, and roughly 30-32 million civilian casualties, totaling roughly 70 million casualties...
World War I (abbreviated WWI or WW1; also known as the First World War, the Great War, and the War to End All Wars) was a global war which took place primarily in Europe from 1914 to 1918.[2] Over 40...