The 64th Air Expeditionary Group is a provisional United States Air Force group, most recently assigned to AFNORTH. In that capacity, in support of FEMA operations across the United States, the 64 Air Expeditionary Group (AEG) led Air Force doctors, nurses, medics and general purpose staff augmenting the civilian work force in hospitals along the west coast of California to reduce the patient load on civilian providers battling COVID-19. As the number of United States citizens with COVID-19 declined, the group transitioned to establishing Air Force-led COVID-19 Community Vaccination Center (CVC) sites.

Hamilton Field was a United States Air Force base, which was inactivated in 1973, decommissioned in 1974, and put into a caretaker status with the Air Force Reserve until 1976. It was transferred to the United States Army in 1983 and was designated an Army Airfield until its BRAC closure in 1988. It is located along the western shore of San Pablo Bay in the southern portion of Novato, in Marin County, California.