which logo on a flag identifies a ship crew as pirates
Jolly Roger The flag most commonly identified as the Jolly Roger today, the skull and crossbones symbol on a black flag, was used during the 1710s by a number of pirate captains including Black Sam Bellamy, Edward England, and John Taylor, and it went on to become the most commonly used pirate flag during the 1720s.
Service flag A service flag approved by the Secretary of Defense may be displayed in a window of the place of residence of individuals who are members of the immediate family of an individual serving in the Armed Forces of the United States during any period of war or hostilities in which the Armed Forces of the United States are engaged.[14]