during the Korean War, It is also the nickname of a military insigne that depicts an old-fashioned grenade with a lit fuse. The device is in various armies; examples include The Canadian Grenadier Guards, The Princess Louise Fusiliers, the British Royal Engineers and Royal Artillery (displayed on their "collar dogs"), and the U.S. Army's ordnance departments. See also Anti-aircraft warfare References Anti-aircraft guns of Germany World War I anti-aircraft guns 37 mm artillery Rotary cannon