Eugene the Jeep's go-anywhere ability resulted in various industrial and four-wheel drive vehicles getting nicknamed "Jeep" in the late-1930s. Around 1940, converted 4WD Minneapolis-Moline tractors, supplied to the U.S. Army as prime movers, were called "jeeps", and Halliburton used the name for an electric logging device, or for a custom built four wheel drive exploration/survey vehicle. A small, anti-submarine, escort aircraft carrier was called a "jeep carrier" in the U.S. Navy in WWII, and also several aircraft – prototypes for both Kellett autogyros, and for the Boeing B-17 Flying Fortress, as well as the 1941 Curtiss-Wright AT-9 were called "jeeps". Additionally, in 1936/1937, Canadian soldiers had received a ton Marmon-Herrington half-track, and called it a "Jeep" (with a capital'J').