Which group of adult males, ages 21 to 30,was not required to serve in the u. s. military during world war 1

Conscientious objectors. The United States government wanted as many men as they could get to join the force voluntarily. However, a law was passed in 1916 establishing that men had to register regardless of their will. Conscientious objectors were those men who were refusing to join the forces for moral or religious reasons. There were about 16,000 of them who were either sent to prison or allowed to do non-military work (like farming or as strecher-bearers on the battlefields) since their conscience didn't allow them to kill.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.