It participated in the following World War II campaigns: Kwajalein, Saipan, Tinian and Iwo Jima while under the command of Lieutenant Colonel Lewis C. Hudson.
Roi Namur The 25th Marines were transferred to the West Coast in August 1943 the 2nd battalion sailed for San Diego via Panama Canal.
The main objective for 25th Marines was the capturing of the small off-shore islands, which should served as artillery sites for fire support of advancing units.
The main objective of 4th Marine Division was the capture of Aslito airfield in the southern end of the island and advance north along the east coast.
After mopping-up operations in the southern part of the Island, 2nd Battalion, 25th Marines went to the reserve on June 26 and remained there until the beginning of July.
The repeated attack on the morning of the next day was so intense that even personnel from the battalion aid station took part in the defense.
2nd battalion took up in the mopping-up operations and Tinian was declared secured on August 1, 1944 Iwo Jima The right-most landing area was dominated by Japanese positions at the Quarry.
2nd battalion on Blue beach 2 on February 19 with the orders to seize high ground located 500 yards inland.
Although suffering painful wounds, he refused medical aid until all other casualties had been given treatment, continuing to supervise the attack until replaced by a new battalion commander, Lt.Col.
The most arduous task left to the 25th Marines was the taking of the Motoyama Plateau with its distinctive Hill 382 and Turkey knob and the area in between referred to as the Amphitheater.
With the cessation of hostilities in the Persian Gulf, the 2nd platoon of Fox Company was subsequently diverted to Bangladesh for participation in Operation Sea Angel, in May 1991.
During the summer of 2007, the battalion was joined by medical and veterinary civil affairs units and traveled to Senegal for Operation Shared Accord.
In September 2008, 2/25, with individual augments from 1/25 and 3/25, the battalion was deployed to Al Anbar Province in support of Operation Iraqi Freedom.
It was split into two 500 Marines "half-battalion" units to pursue separate missions: Force protection of Al Asad Air Base and counterinsurgency operations in the area around Camp Korean Village, Iraq.
In the summer of 2010, over 400 Marines from the battalion were stationed in Mozambique to train with the local military and conducted humanitarian medical Civil Affairs in towns near the capital.