Military aircraft? Ours or someone else's?

Seen a military aircraft east of Garfield Arkansas. Had a blinking white aircraft light. Was definitely not civilian. Extremely high altitude, and moving at a high rate of speed. It was out running the engine exhaust cloud trail by a long distance before the exhaust trailer would appear behind the aircraft.   Sound barrier breaking speed. It's quiet living in the country and never heard a sound. I tracked the aircraft appearing in the sky east of Garfield Arkansas. The flight path was southwest in direction. Total time I was able to track with just my eyes was all of 1 minute, minute and a half at most. Fastest moving aircraft I've ever seen. Fast and silent. It was military, not civilian.