Medford, Oregon: A formation of 6 CH-47 Chinook Helicopters, possibly U.S. Army (Guard?) or US Marine Corps flew into the Rouge Valley International Airport yesterday at approximately 10:30hrs. Throughout the rest of the day, U.S Navy Transport Aircraft (as Identified on the fuselage), possibly C-20's (?) were flying in and out of the Rogue Valley International Airport. This is Military Activity out of the norm for the area. The Klamath Falls Airbase, Kingsley Field, would normally see this traffic, and so does the RVIA when National guard Units are conducting Drill. However, this is a weekday (late) morning, and Military Air Traffic is not normally seen like this.