(n.) The act or process of recruiting; especially, the enlistment of men for an army.

bugle call call call to arms call-up catchword clarion clarion call compulsory military service conscription draft draft call drafting enlistment enrollment exhortation go for broke gung ho impressment induction levy mobilization muster press rally rallying cry rebel yell recruiting selective service slogan summons trumpet call war cry war whoop watchword