I thought it would be a good idea to list different US SOF's and what they do. US SOF's can be a complicated matter, and many brits I feel do not know how to distinguish one from the other. The same can be said for Americans with regards to UKSF. In UKSF, there is SAS/SBS/SRR/SFSG, with various supporting elements. American equivalents for the above would be CAG (Delta)/DEVGRU/Intelligence Support Activity/US Army Rangers respectively. In the US, there is only one special forces, and that is the US Army Special Forces (Green Berets). US Army SF are a versatile unit, but their main job is training foreign guerillas and leading them into battle (ie Afghanistan in 2001) and training foreign nationals. For the army there is also the 160th SOAR, helicopter pilots who taxi US SOFs. The US Navy has SEALs, a maritime SOF unit that specializes in direct action and special reconnaissence. As well as Navy Explosive Ordnance Disposal (basically EOD techs who are also trained to operate in hostile environments). There is also Special Warfare Combatant Crewmen, (SWCC), who operate boats that insert SEALS or other SOF's. The USMC has MARSOC, which is a mixture of FID specialists and Force Recon like operators. Force Recon, never considered a part of US SOF, were absorbed by MARSOC. Their job is deep reconnaissence for Marine Expeditionary Units. The USMC also still has batallion Recon, that is not considered SOF. The US Air Force has SOF as well. There are USAF Pararescue Jumpers, who specialize in Combat Search and Rescue, the rescuing of downed pilots. They are also trauma care specialists and combat medics. There are also USAF Combat Controllers, who are combat oriented ground air traffic controllers, and also specialize terminal attack control (like British FAC's). The USAF also has something called Combat Weather, who gather meteorological data in a hostile environment. (In my opinion, the only suspect US SOF, I really don't why we need weather commandos.) That about covers it. It is often said that US SOCOM numbers more than 55,000. The vast majority of this, however, is support. There are only about 15,000 actual operators in total, however, and that includes the weather commandos, the 160th SOAR, and the SWCC.