This is about MARSOC:
MARSOC comprises roughly 2,500 Marines and supporting sailors. It is based at Camp Lejeune and is split into five subordinate commands:
The Marine Special Operations Advisor Group (MSOAG), based at Camp Lejeune, contains about 400 infantry personnel and trains friendly foreign military forces in an effort to ease the workload for Army Special Forces to concentrate on more specialized missions. (Formerly the Foreign Military Training Unit)
Two Marine Special Operations Battalions (MSOBs), one on each coast (one at Camp Lejeune, the other at Camp Pendleton, California).Their tasks are direct action, special reconnaissance, foreign internal defense, counter-terrorism, unconventional warfare, and information operations. Each MSOB consists of four or five Marine Special Operations Companies (MSOCs), commanded by a Major (O-4). Three Marine Special Operations Teams (MSOTs) make up the MSOC, commanded by a a Captain (0-3) and Team Sergeant (E-7 / E-8), consisting of 14 operators in each team. The core personnel strength of the MSOTs was initially drafted from Force Reconnaissance Marines.
The Marine Special Operations Support Group (MSOSG) at Camp Lejeune, which also comprises 400 personnel, contains the Command's administrative, intelligence, and support assets.
The Marine Special Operations School (MSOS) at Camp Lejeune conducts screening, recruiting, training, selection, assessment, and development functions for MARSOC.
This is about FORCE RECON:
United States Marine Corps Force Reconnaissance (Force Recon) units are special-purposes units roughly analogous to the U.S. Army Special Forces and are widely recognized as the "special operations forces" of the United States Marine Corps. Marine Force Recon personnel, or "operators", perform highly specialized, small scale, high-risk operations, such as:
Amphibious and deep ground surveillance.
Assisting in specialized technical missions such as Nuclear, Biological, Chemical, Radio, sensors and beacons, etc.
Assisting in ordnance delivery (i.e., designating targets for close air support, artillery and naval gunfire).
Conducting direct action raids, such as gas and oil platform (GOPLATS) raids and the capture of specific personnel or sensitive materials.
Counterinsurgency Operations
Behind Enemy Lines Assault
Deep Reconnaissance
Hostage/prisoner of war rescue
Unconventional warfare
Foreign Internal Defense
Counter-Terrorism
Force Reconnaissance units have been recently integrated into the United States Special Operations Command (USSOCOM), and are now part of Marine Special Operation Battalions East and West. However, United States Marine Corps Forces Special Operations Command (MARSOC) won't be fully integrated into SOCOM until 2010.
And they are at:
1st Force Reconnaissance, based at Camp Pendleton, California; 2nd Force Reconnaissance, based at Camp Lejeune, North Carolina; 3rd Force Reconnaissance Company, based in Mobile, Alabama and 4th Force Reconnaissance Company, based in Honolulu, Hawaii. 5th Force Reconnaissance was folded into 3rd Reconnaissance Battalion as Bravo Company, which also deploys as the Deep Reconnaissance Company in the 31st MEU(SOC) at Okinawa.
The Recon Battalions:
Marine Reconnaissance Battalions in the United States Marine Corps, often called "Recon Marines", exist to provide information about the enemy situation to higher command via patrols behind enemy lines. The members of Recon Battalions are specially selected through a grueling screening process at their respective Battalion, and upon their completion attend the Basic Reconnaissance Course at Reconnaissance Training Company, School of Infantry West. While at this school Recon Marines receive training on mission planning, advanced patrolling, advanced radio communications, advanced land navigation, reconnaissance and surveillance techniques, fast-roping, rappelling, calling for artillery and close air support, small boat operations, and clandestine amphibious operations. Upon successful completion of either school the Marines receive the MOS of 0321 Reconnaissance man. He will then attend SERE School, Army Airborne School, and Combatant Diver school. In addition to these core courses Recon Marines will have the opportunity to attend Sniper school, Military Free Fall school, Ranger school, and Helicopter Rope Suspension Training (HRST) master school as slots become available.
Traditionally, Recon Marines have operated ahead of the front lines, making extended foot patrols deep into unfriendly territory, carrying light equipment and avoiding detection by or contact with the enemy. In the Iraq War, however, they have operated in a more traditional counterinsurgency role, patrolling in Humvees, wearing Kevlar helmets and body armor, gathering intelligence face-to-face rather than through binoculars, and acting directly on the intelligence they gather rather than simply passing it on to higher command.
There are 4 reconnaissance battalions in the Marine Corps:
1st Reconnaissance Battalion 1st Marine Division Camp Pendleton, California
2nd Reconnaissance Battalion 2nd Marine Division Camp Lejeune, North Carolina
3rd Reconnaissance Battalion 3rd Marine Division Camp Butler, Okinawa, Japan
4th Reconnaissance Battalion 4th Marine Division Marine Forces Reserve San Antonio, Texas
For more details and answers go here:
http://www.marsoc.usmc.mil/
Hope that helps....