What was the age limit to go to war?

The age limit to enlist in the military during wartime typically varies by country and conflict. In the United States, for example, the minimum age for voluntary enlistment is 18, while individuals can be drafted at 18 years old. Historically, during World War I and II, drafts often included men up to their late 30s or early 40s, depending on the needs of the military and specific legislation at the time.