CALL n.
The act of calling; -- usually with the voice, but often otherwise, as by signs, the sound of some instrument, or by writing; a summons; an entreaty; an invitation; as, a call for help; the bugle's call. "Call of the trumpet." Shak. I rose as at thy call, but found thee not. Milton.
CHARGE n. 2 definitions
sudden onset or attack, as of troops, esp. cavalry; hence, the signal for attack; as, to sound the charge. Never, in any other war afore, gave the Romans a hotter charge upon the enemies. Holland. The charge of the light brigade. Tennyson.