Since at least the Vietnam War, an increasingly critical element of air combat has been the radar early warning system. As ...

University of Kansas Publications, Museum of Natural History 3, 361-472 (1951). Russell, K. R. & Gauthreaux, Jr., S. A. Use of weather radar to characterize movements of roosting purple martins.

Radar was one of the most important factors in the RAF's success in the Battle of Britain. It was deployed across the UK as part of an early warning system which detected incoming enemy planes.