How many men signed up for the war?

The number of men who signed up for a war can vary greatly depending on the specific conflict being referenced. For example, during World War I, millions enlisted, with the U.S. alone seeing around 4.7 million men join the armed forces. In World War II, approximately 16 million Americans served in the military. Each war had its unique recruitment numbers based on factors like the nature of the conflict, draft policies, and public sentiment.