Several countries have compulsory military service, also known as conscription or draft.
However, it's important to note that the policies and practices regarding compulsory military service can change over time. Here are some countries that had compulsory military service
Compulsory military service for men between the ages of 18 and 50.
Compulsory military service for men between the ages of 18 and 45.
Compulsory military service for both men and women between the ages of 18 and 21.
Compulsory military service for men between the ages of 18 and 44
Compulsory military service for men between the ages of 18 and 28.
Compulsory military service for men between the ages of 18 and 34
Compulsory military service for men between the ages of 18 and 40.