Verb
cry havoc (third-person singular simple present cries havoc, present participle crying havoc, simple past and past participle cried havoc)
(obsolete) To shout out 'Havoc!'; that is, to give an army the order to plunder.
Members of the Cry Havoc Theater Company perform during the 12th Annual MLK, Jr. Symposium at City Performance Hall in Dallas on Martin Luther King, Jr. Day on Jan. Source: Internet