By contrast, the F-15 Eagle which was another fighter aircraft of that era was designed for air superiority and interception, with the mantra "not a pound for air to ground", although the F-15C did have a rarely used secondary ground attack capability. That program eventually evolved into the F-15E Strike Eagle interdictor/strike derivative which retained the air-to-air combat lethality of earlier F-15s.
In comparison to other fighter aircraft from that era, such as the F-15 Eagle, which was designed for air superiority and interception with the principle "not a pound for air-to-ground", the F-15C had a secondary ground attack capability. This concept later developed into the F-15E Strike Eagle, preserving the earlier model's combat effectiveness.