How many men had signed up for world war 1 by 1916?

By 1916, approximately 10 million men had enlisted in the armed forces of the major combatant nations involved in World War I. This figure includes troops from countries such as Britain, France, Germany, and Russia, among others. The massive scale of enlistment was driven by patriotism, conscription, and the initial belief that the war would be short-lived. However, the prolonged nature of the conflict soon led to staggering casualties and a reevaluation of military strategies.