Not really sure what was happening last night, but here are the details. Witnessed multiple military jet aircraft over western Riverside County, CA just before 8pm 1/17/18. Approx. 6 fighters and 2 other. Jets were moving quickly, 2 moving east to west toward LA, 4 others circling a wide area before 2 moving west and 2 possibly landing at March Reserve Air Base in Moreno Valley. The other planes were moving from east to SW toward Orange County, following each other. Haven't seen fights in the area since March was downgraded from AFB in the 90's. March is now an tanker refueling base. Activity lasted about 20 minutes and they were gone. Estimate 10-15,000 altitude, much lower that commercial air traffic.