The term for it is conscription. Some nations may refer to it as a 'draft', 'national service', or something to that effect.
enlist or enlistment
deserters
There is no more mandatory enlistment. It was removed by the "Bundestag" in 2011.
The US Army has an enlistment program to help recruit troops.
William Joseph Chamberlain has written: 'Fighting for peace' -- subject(s): Compulsory Military service, Conscientious objectors, Great Britain, Great Britain. Army, Military service, Compulsory, No-Conscription Fellowship, Recruiting, enlistment, World War, 1914-1918
A means of raising an army; eligible people are forced to join the armed forces of a country
A standard term of enlistment in the US Army in 1964 was 2 years. Source: My dad, who was enlisted for 2 years.
It is called a draft. The US military used them until right after Vietnam. It is still used in some countries such as Israel, in that country each citizen is required to serve 2 years in the military.
bounties
When his enlistment term is up, or when he is discharged.
In the US Army, no. The minimum age for enlistment in the US military is 17.
ages 17-49 Mandatory Male Enlistment Age (for the populations subject to mandatory enlistment): 17-21 Mandatory Female Enlistment Age (for the populations subject to mandatory enlistment): 17-20