In 1978 , 4 Iranian Chinooks strayed into the Soviet Union while training . One was damaged and one shot down by a Soviet pilot in a MiG-23 Flogger . The interception was possibly due to Project Dark Gene as the Soviets had increased their air defences on the Iranian border in response to prior incursions
1978 , 4 Iranian Chinooks
1978 Iranian Chinook shootdown
Project Dark Gene