This is a single player mission for DCS World P-51D Mustang.
During a routine patrol your flight stumbles upon a squadron of FW-190Ds returning from a raid. They have numerical superiority, but altitude is on your side. Swoop down and visit death upon the hun before they make it back to base.
To install place the file in <DCS world install folder>\Mods\aircrafts\P-51D\Missions\EN\Single