war cry

a cry, word, phrase, etc., shouted in charging or in rallying to attack; battle cry.

a slogan, phrase, or motto used to unite a political party, rally support for a cause, etc.

Origin of war cry

First recorded in 1740–50

On the brink of the cliff MacGregor on his knees was chanting his war-cry, his thanks that vengeance had not been denied him.

The Snow-Burner |Henry Oyen
Our own war-cry may well be said to have been an echo of this national enthusiasm.

Human Bullets |Tadayoshi Sakurai
It was Gipsy's war-cry, and, at the sound of it, Duke became a frothing maniac.

Lords of the Housetops |Various
My neebor was an old frontiersman; he had fought against the tribe and knew their war-cry.

True to the Old Flag |G. A. Henty

Condemned for that war-cry, which inspired to as glorious a charge as was ever made on battle field, "Fremont and the Union."

The History of the Fifty-ninth Regiment Illinois Volunteers |David Lathrop

war cry

a rallying cry used by combatants in battle

a cry, slogan, etc, used to rally support for a cause