From Wiktionary, the free dictionary
From squadron + mate.
squadronmate (plural squadronmates)
- One who is in the same squadron.
2007 October 7, Jeremy Pearce, “Stanley P. Butchart Dies at 85; Pushed Airspeed Envelope”, in New York Times[1]:After the war, he studied engineering at the University of Washington, and maintained his friendship with a former squadronmate, George H.W. Bush .