Philadelphia is the largest city in Pennsylvania and the sixth most populous city in the United States and seventh poorest densely populated city in the U.S.

Los Angeles is the largest city in the state of California and the second-largest in the United States. Often abbreviated as L.A., it is rated an alpha world city having an estimated population of 3.8 million and spanning over 469.1 square miles (1,214.9 square kilometers) in Southern California.

The Department of the Army is one of the three service departments in the United States Department of Defense. It is headed by the Secretary of the Army, a civilian, who is responsible for the administrative (non-operational) affairs of the United States Army.

The Department of the Navy consists of Executive offices, mostly located at the Pentagon and the adjacent Navy Annex, and is responsible for the recruiting of military and civilian personnel, organizing, supplying, equipping, training, and the mobilization and demobilization of the Navy and Marine Corps, and their human capital and physical assets. The Department also oversees the construction, outfitting and repair of naval ships, aircraft, equipment, and facilities.

The United States Air Force (USAF) is the aerial warfare branch of the United States armed forces and one of the seven uniformed services of the U.S.

The Office of Naval Research (ONR) has a history as the science and technology provider for the Department of the Navy, advancing the operational concepts and visions for the Navy and Marine Corps of the future.