From Longman Dictionary of Contemporary Englishwar cryˈwar cry noun [countable] PMSHOUTa shout used by people fighting in a battle to show their courage and frighten the enemy SYN battle cry
Examples from the Corpus
war cry• In each case the shout is far more than simply a war cry.• Keep Britain White was the war cry.• When I still refused, they gave their war cry and began dancing about to frighten me.War Cry, TheThe War CryˈWar Cry, The the weekly newspaper of the Salvation Army in the UK whose members go into bars and pubs to try to sell it to customers 