There isn't one single "most secretive" unit, but the U.S. military's Tier 1 Special Mission Units (SMUs), like Delta Force, are exceptionally secretive, focusing on counterterrorism and direct action, while the Intelligence Support Activity (ISA), known as "The Activity," operates in deep cover to gather critical intel, making it arguably the most clandestine overall due to its shadowy intelligence role. Other highly classified units include the Air Force's 24th Special Tactics Squadron and foreign entities like Israel's Unit 8200, but ISA's shadowy nature makes it a top contender for pure secrecy, often using code names and operating in civilian guise for intelligence gathering.
*Delta Force (1st Special Forces Operational Detachment-Delta)*: Although part of the U.S. Army, Delta Force is worth mentioning as it is one of the most elite special operations units in the U.S. military, focusing on counter-terrorism and direct action missions.
Neither SAS nor SBS is definitively "more elite"; they are equally elite but specialized, with the SAS focusing on land/air and the SBS on maritime/amphibious roles, both part of the UK's UK Special Forces (UKSF) and sharing the same rigorous Joint Special Forces Selection process, with SBS adding extra maritime training like swimmer-canoeist skills. Think of them as the Army's and Navy's top-tier counterparts within the same elite special forces framework.
The first on the list would the be US Navy Seals. Although one would argue that the British SAS ranks higher than the SEALS, but it is widely accepted that the US Navy SEALS are the best when it comes to SF. Born in 1962, the Navy SEALs (Sea, Air, and Land Teams) are America's elite maritime special operations force.
Civil Affairs Group, the civil-military operations coordinators of the United States Marine Corps. Commander Air Group, most senior officer of the embarked squadrons in a carrier air wing. Delta Force (also Combat Applications Group), a special operations force of the United States Army.
The SAS is a secret organisation. Its members often do not tell anyone except close family that they are in it.
We enlisted 15 of the best of the best Special Forces around the world.
The idea is that when your mind tells you you're done and can't go any further, you are only at about 40% of your actual capacity. Push for that extra 60% when your mind is telling you to quit, that you're “at your limit.” Because you're most likely not.
The list of best Special Forces in India includes the following:
The 15 Most Secretive Units in U.S. Military History
Navy SEALs and Army Special Forces (Green Berets) are elite U.S. armed forces units. There is some overlap in the kinds of missions they carry out but there are important differences between the two.
The DCI's title now is "Director of the Central Intelligence Agency" (DCIA), serving as head of the CIA. Currently, the Central Intelligence Agency answers directly to the Director of National Intelligence, although the CIA Director may brief the President directly.
However, certain secret agents stand out for their activities and contributions to history.
M15 is a secret Intelligent unit primarily deals with internal affairs but terrorists unusually and The Great MI6 deals with foreign affairs which has to do with the UK or not. M07 become MI7 in 1916 after the War. Which is responsible for information and press or propaganda. MI8 is the Radio Security Service (RSS).
The U.S. continues to dominate as the world's most powerful military. With a budget nearing $900 billion, it invests heavily in advanced warfare systems, from cyber capabilities to space defense. It fields the largest air force globally with over 13,000 aircraft, including stealth fighters like the F-22 and F-35.
3 Commando was a battalion-sized Commando unit raised by the British Army during the Second World War. Formed in July 1940 from volunteers for special service, it was the first such unit to carry the title of "Commando".
Established in 1977 and based at Fort Bragg, North Carolina, Delta Force is regarded as one of the most elite and secretive military units worldwide. It functions under the U.S. Army Special Operations Command and answers to the Joint Special Operations Command (JSOC).
In October 2018, recruitment policy changed to allow women to become members of the SAS for the first time. In August 2021, two women became the first to pass the pre-selection course, making them eligible for the full course.
BEAR GRYLLS OBE, has become known worldwide as one of the most recognized faces of survival and outdoor adventure. Trained from a young age in martial arts, Grylls went on to spend three years as a soldier in the British Special Forces, as part of 21 SAS Regiment.
Pay & benefits
On successful completion of Selection, the starting daily rate for an SAS Trooper is £134.89, plus all the usual Army Reserve service incentives, which includes an annual tax-free bounty, paid leave and pension.
Delta Force – United States
Officially known as 1st Special Forces Operational Detachment-Delta, Delta Force is America's most elite counter-terrorism and hostage rescue unit. Their missions are top secret—and always successful.
Delta Force, headquartered at Fort Bragg in North Carolina, draws candidates from throughout the military, including the Coast Guard and National Guard, but mostly selects from the Army. Many of the operators likely come from the Army Rangers and the Green Berets. The classified group was established in 1977 by Col.
VanSant held the position of Soldier Systems Commodity Chief, then as the Deputy Chief of the G8, Force Modernization Office, for 1st Special Forces Command. Mr. VanSant retired in 2015.