World War II, or the Second World War, was a global military conflict lasting from 1939 to 1945 which involved most of the world's nations, including all great powers, organized into two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, with more than 100 million military personnel mobilized. In a state of total war, the major participants placed their entire economic, industrial, and scientific capabilities at the service of the war effort, erasing the distinction between civilian and military resources. Marked by significant action against civilians, including The Holocaust, and the first war to use nucleur weapons. It was the deadliest conflinct in human history with over 70 million casualties.
World War II, or the Second World War, was a global military conflict lasting from 1939 to 1945 which involved most of the world's nations, including all great powers, organized into two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, with more than 100 million military personnel mobilized. In a state of total war, the major participants placed their entire economic, industrial, and scientific capabilities at the service of the war effort, erasing the distinction between civilian and military resources. Marked by significant action against civilians, including The Holocaust, and the first war to use nucleur weapons. It was the deadliest conflinct in human history with over 70 million casualties.