The Marine Corps has served a role in every conflict in the history of the United States.
That's because the Marines operate on sea, air, and land — unlike the other sister-service branches.
Since the Marines are amphibious, they can respond to a crisis in under 24 hours with the full force of a modern military.
That's because the Marines operate on sea, air, and land — unlike the other service branches — and can respond to a crisis in less than 24 hours with the full force of a modern military.
Today there are more than 220,000 active-duty and reserve Marines.
To celebrate the Corps, we've pulled some of the best photos of America's most adaptive fighting force.
The Marine Corps is the coolest thing ever (BI)
There is nothing quite like America's amphibious Marine Corps
Cpl. Justin Dudley from Oxnard, California, with Marine Medium Tiltrotor Squadron 262 (Reinforced), 31st Marine Expeditionary Unit, 3rd Marine Expeditionary Brigade, keeps watch while flying in a UH-1Y Venom during Amphibious Landing Exercise 15 at Crow Valley, Sept. 30, 2014.
Cpl. Daniel Hopping, assaultman, Weapons Company, 1st Battalion, 7th Marine Regiment, and a native of Rogers, Arkansas, shields himself from dust being kicked up from a CH-53E Super Sea Stallion lifting off during a mission in Helmand province, Afghanistan, April 28, 2014.
Marines with the 15th Marine Expeditionary Unit Maritime Raid Force depart the USS Essex (LHD 2) on a combat rubber raiding craft during Amphibious Squadron Three/Marine Expeditionary Unit Integration Training (PMINT) off the coast of San Diego March 4, 2015.
(Photo via US Marine Corps)
Gunnery Sgt. Eddie Myers, parachute safety officer assigned to Detachment 4th Force Reconnaissance Company, parachutes from a UH-1Y Venom helicopter during airborne insertion training at the flight line aboard Marine Corps Air Station Kaneohe Bay June 10, 2015.
Marines assigned to Force Reconnaissance Platoon, Maritime Raid Force, 26th Marine Expeditionary Unit (MEU), conduct a high altitude low opening (HALO) jump during category 3 sustainment training in Louisburg, N.C., June 2, 2015.
Marines and sailors with the 15th Marine Expeditionary Unit's Maritime Raid Force ride in rigid-hull inflatable boats during maritime interoperability training off the coast of Camp Pendleton, California, Jan. 12, 2015.
A Marine engages targets from a UH-1Y Venom with Marine Medium Tiltrotor Squadron 161, 15th Marine Expeditionary Unit, during Composite Training Unit Exercise (COMPTUEX) above San Clemente Island, California, March 20, 2015.
Marines and sailors in the Basic Reconnaissance Course practice their helocasting skills at Naval Amphibious Base Coronado and in San Diego Bay on Nov. 6, 2013.
Force Reconnaissance Marines with the Maritime Raid Force, 24th Marine Expeditionary Unit perform a diving exit while conducting an initial High Altitude Low Opening jump out of an MV-22B Osprey at Marine Corps Auxiliary Landing Field Bogue Field, N.C., Aug. 11, 2014.
US Marines with Alpha Battery, 1st Battalion, 12th Marines fire the M777-A2 Howitzer down range during Integrated Training Exercise 2-15 at Blacktop Training Area aboard Camp Wilson, Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Jan. 31st, 2015.
(Photo via US Marine Corps)
US Marines with Combat Logistics Detachment 1, Combat Logistics Battalion 13, 1st Marine Logistics Group, practice "combat gliding" during Integrated Training Exercise 2-15 at Camp Wilson on Twentynine Palms, California, Jan. 31, 2015.
U.S. Marines with the 15th Marine Expeditionary Unit's Maritime Raid Force board a gas and oil platform during maritime interoperability training off the coast of Santa Barbara, California, Jan. 16, 2015.
A U.S. Marine attached to Weapons Company, 1st Battalion, 3rd Marine Regiment - "The Lava Dogs" fires a Javelin at a simulated enemy tank during Lava Viper aboard Pohakuloa Training Area, Hawaii, May 29, 2015.
An MH-60S Seahawk, assigned to Helicopter Sea Combat Squadron 25, lowers a rescue swimmer into the water as part of a simulated combat search and rescue water extraction at Agat Bay, Guam, during Exercise Forager Fury II (FF II), Dec. 11, 2013.