One F-117 (AF ser. no. 82-0806) was lost to enemy action. It was downed during a mission against the Army of Yugoslavia on 27 March 1999, during Operation Allied Force.
https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk#Combat_loss
> One F-117 (AF ser. no. 82-0806) was lost to enemy action. It was downed during a mission against the Army of Yugoslavia on 27 March 1999, during Operation Allied Force.
https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk#Combat_loss