The US Army requirement for a light utility helicopter was formulated after the Korean War. Bell's Model 204 design won a competition in 1955, and was given the military designation H-40, later renamed the HU-1 Iroquois. The original design called for a helicopter that could be used for transport, airborne battlefield command and control, medical evacuation, fire support co-ordination and search and rescue. Later its missions would be expanded to...
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