Alien or Military?

I live north of San Antonio TX in the quiet country and east of Camp Bullus, a large military training facility.

A couple of months ago I saw a large fixed-wing air plane moving east to west toward the north end of Camp Bullus. I could see all of the regular lights on the air plane, it was flying between 1000-2000 feet agl. Elevation is hard to determine at night unless you know how large the aircraft is so that's an estimate.

The strange thing was that it seemed about 1 mile north of me moving fast but IT MADE NO SOUND at all! It was like hitting the mute button on the TV remote to see this dark plane just slip by me without any noise.

Are aliens imitating aircraft now?