Parallel to the development of the UH-1 transport helicopter, Bell was actively conducting research on helicopter gunship designs. This resulted in the creation of the “Iroquois Warrior”, a mockup of a gunship design based on components from the UH-1B Huey. The mockup was presented to interested Army officials in June 1962, resulting in a proof-of-concept contract later that year. Following the contract award, Bell created the Model 207 “Sioux Scout”, which was evaluated by the Army in early 1964.

Although impressed by the Model 207, the Army seeked a larger and more powerful design, resulting in the creation of a new competition of which Bell was not a part of. Instead, Bell independently continued developing and refining their gunship design, eventually creating the Model 209 - a design that was a combination of the Iroquois Warrior mockup and the concepts behind the Model 207.

Meanwhile, the ongoing Vietnam War sparked an urgent demand for dedicated attack helicopters. Although gunship versions of the UH-1 performed this role with relative success, the fact that they weren’t initially intended for this role somewhat limited their effectiveness. Back in the States, the Army’s ongoing competition produced no winning design as a result of technical and political difficulties. To quickly address their demand, the Army started looking for an interim design to act as a stopgap measure in 1965.

Soon after testing of the Model 209 concluded in September 1965, the Army decided to award Bell with a manufacturing contract later that year. The contract officially put the Model 209 into production under the Army designation of UH-1H HueyCobra, but was later redesignated to AH-1G Cobra.

The AH-1G Cobra entered service with the U.S. Army in 1967, participating mainly through the remainder of the Vietnam War as well as other conflicts. The AH-1G was retired from active service in the early 1980s, being replaced by newer models of the Cobra.