A bugle call is a short musical phrase played on a bugle, which is a brass instrument. The most common bugle calls are 'Taps' (4 letters), 'RETREAT' (7 letters), 'REVEILLE' (8 letters), 'TATTOO' (6 letters), 'Hallali' (7 letters), 'ASSEMBLY' (8 letters), and 'CHARGE' (6 letters). Taps is a call that signals the end of the day, RETREAT is a call that signals the lowering of the flag, REVEILLE is a call that signals the start of the day, TATTOO is a call that signals the end of evening activities, Hallali is a call that signals the end of a hunt, ASSEMBLY is a call that signals the gathering of troops, and CHARGE is a call that signals an attack.