The M61 Vulcan, generally mounted on aircraft, is a 20mm, six-barrel rotary weapon styled after the famed Gatling Gun, which entered service with U.S. forces in 1959 and saw extensive deployment during the Vietnam War. Still in use, the M61 provides highly accurate 20mm fire against air and ground targets at a rate of approximately 100 rounds per second.
During WWII, the unique civilian organization did much to boost the morale of soldiers at home and abroad.
Acclaimed General Lloyd Fredendall lost his command after the debacle at the Battle of the Kasserine Pass.
The surprise attack on Pearl Harbor on December 7, 1941, benefited from the firsthand observation of spies on Oahu.