Windmill, a.k.a. Edward J. Roth, has worn a number of hats in his military career; flight instructor, helicopter test pilot, and finally, member of G.I. Joe.
Devil's Due G.I. Joe vs. the Transformers continuity
Windmill flew the Skystorm X-Wing Chopper as part of a G.I. Joe mission to the Himalayas of Tibet to stop the forces of Cobra-La and Unicron. Unfortunately, while battling the nightmarish Monstructor, Windmill's life force was drained, causing him to lose control of his vehicle. The giant Transformer threw a Snow Cat into the tumbling helicopter, presumably killing Windmill.