The battalion is based in Seal Beach, California and its primary weapon system is the M777A2 howitzer with a maximum effective range of 40 km.

This was purely an administrative move since the battalion was attached to the 14th Marine Regiment for upcoming Operation Forager, the invasion of the Marianas.

The 105s could range the northern half of Tinian so were used for preliminary fires and then supported the landing by the 4th Marine Division.

Once the White Beaches had been taken, the Marine 105s loaded into landing ships then sailed for Tinian Town located about halfway down the island.

[3] Marines detached from 5/14 (Pico Rivera CA) served at the Naval Weapons Station Seal Beach during The Vietnam War.

Marines assigned to Seal Beach primarily served as a Security Detachment for the Naval Weapons Depot while being held in ready reserve for battle duty.

Ceremonial duties included Color Guards and Honors Rifle Teams for parades and military funerals.

In 1994 the Northridge earthquake damaged the battalion's facility there and caused the unit to move to the Long Beach Naval Station.

The battalion occupied the current site on the Weapons Station, the Sergeant Foster Reserve Training Center, during October 2000.