How old were men when they joined the war?

Men who joined the war, particularly during World War I and World War II, typically ranged in age from late teens to their mid-twenties, with many enlisting around 18 years old. Draft laws often required men to serve once they reached a certain age, usually starting at 18. However, some older individuals also volunteered or were conscripted, depending on the needs of the military and the duration of the conflict.