Military origin as the OH-6 Cayuse in Vietnam, 1,420 units produced
The MD 500 was born as the US Army's OH-6 Cayuse military project in the 60s, competed against the Bell 206 (LOH program) and won the first competition in 1965. Hughes produced 1,420 OH-6s between 1965-1970 that served intensively in Vietnam in reconnaissance and light attack. The civil Hughes 369 version debuted in 1968. After Hughes was bought by McDonnell Douglas in 1984, it became the MD 500 (later MD Helicopters in 1999, today an independent company in Mesa, Arizona).