Pfc. Tyler Morgan, 21, of Haileyville, was taken into custody Tuesday at Joint Base Lewis-McChord near Tacoma, Washington.
The California wildfires can create their own violent weather, hampering firefighting efforts.
A Washington-based Special Forces soldier has died from wounds caused by an improvised explosive device.
Police say a Ranger killed a woman in her hotel room, then opened fire at two cars before shooting himself late last month.
About 200 troops from the 14th Brigade Engineer Battalion at JBLM will get a course in becoming "wildland firefighters."
The U.S. Army announced it will station three new Security Force Assistance Brigades in Colorado, Washington and Texas.