Question: What was founded in 1941 as a regiment, and later reconstituted as a corps in 1950, that fought along side a Greek special forces unit formed in 1942 in the Middle East in the Western Desert and the Aegean?

Context articles: Para (Special Forces)
Namibian Special Forces
Black Swans (special forces)
Special Forces Regiment (Airborne)
Sacred Band (World War II)
Cuerpo de Fuerzas Especiales
Special Air Service
Korps Speciale Troepen
Special Operations Force (Singapore)
Z Special Unit

Para (Special Forces) is a special forces unit of the Indian Army's Parachute Regiment tasked with missions such as special operations, direct action, hostage rescue, counter-terrorism, unconventional warfare, special reconnaissance, foreign internal defense, counter-proliferation, counter-insurgency, seek and destroy and personnel recovery.
 The unit's heritage stems from World War II, with the creation of the 50th Parachute Brigade in October 1941.
The Namibian Special Forces is a special operations command of the Namibian Defence Force responsible for special forces and special operations capable units.
 The command consists of Army commandos, Army Airborne paratroopers and the Marine Corps amphibious special operations unit.
 The Army commandos specialise in airborne and land borne insertion while the Marine Corps amphibious special operations unit specialise in small-unit maritime operations that originate from a river, ocean, swamp and delta.
 The army units receive training assistance from former South African Special Forces (Recces) and the marine corps from the Brazilian Marine Corps.
 The units regularly participate in Southern African Development Community (SADC) special forces exercises.
The Black Swans (Bosnian: "Crni Labudovi" ) was a paramilitary unit and special forces unit in the Army of the Republic of Bosnia and Herzegovina.
 It was a "Patriotic League" unit formed in 1992 in Sapna under the 2nd Corps (later 1st Corps), which eventually numbered 800 men.
 It was one of several special Bosnian Muslim units.
 It earned a reputation for battlefield bravery.
 The first commander Senad Mehdin Hodžić was a former member of the Special anti-terrorist unit of the Yugoslav Ministry of Internal Affairs (MUP), when he took the command of the Black Swans he would be known as "Kapetan Labud" or Captain Swan.
 Then Captain Hajro Mešić took over for a while.
 The most successful and lasting commander was Brigadier Hase Tirić.
 The area of operation was Konjic, Igman and Jablanica.
 Black Swans wore black uniforms with a unit patch on the sleeves and the ARBIH patch on the other sleeve.
The Special Forces Regiment (Airborne) is a special forces unit of the Philippine Army and one of three specialized regiments of the Special Operations Command.
 The unit is based on and continually trains with its american counterpart, the U.S. Army Special Forces (Green Berets).
The Sacred Band or Sacred Squadron (Greek: Ιερός Λόχος ) was a Greek special forces unit formed in 1942 in the Middle East, composed entirely of Greek officers and officer cadets under the command of Col. Christodoulos Tsigantes.
 It fought alongside the SAS in the Western Desert and the Aegean, as well as with General Leclerc's "Free French Forces" in Tunisia.
 It was disbanded in August 1945 but is the precursor of the modern Greek Special Forces.
The Mexican Cuerpo de Fuerzas Especiales (Special Forces Corps) is a special forces unit of the Mexican Army.
 Formerly the "GAFE" (Grupo Aeromóvil de Fuerzas Especiales | Special-Forces Airmobile Group), the SF Corps has six battalions; one is the "Fuerza especial de reaccion", a quick-response unit, and one is assigned to the Paratroopers Rifle Brigade; the motto of the SF Corps is "Todo por México" (Everything for Mexico).
 Within the SF Corps, there are regular, intermediate, and veteran -service troops.
 The regular-service soldiers usually operate as light infantry.
 The intermediate-service soldiers (lieutenants and captains) usually are instructors.
 The veteran-service soldiers of the Grupo Aeromóvil de Fuerzas Especiales del Alto Mando (GAFE High Command) handle Black-Ops missions.
 Also known as the COIFE, the Special Forces Corps of the Mexican Army is equivalent to the U.S. Army Special Forces.
The Special Air Service (SAS) is a special forces unit of the British Army.
 The SAS was founded in 1941 as a regiment, and later reconstituted as a corps in 1950.
 The unit undertakes a number of roles including covert reconnaissance, counter-terrorism, direct action and hostage rescue.
Korps Speciale Troepen (KST) was a Royal Netherlands East Indies Army (KNIL) special forces unit who was involved in the Indonesian National Revolution.
 formed in 1948 from the DST (1945-1948) and raised together with the Royal Netherlands East Indies army in 1950.
 It consisted about 570 men.
 Later the 1st Parachute Company (strength about 250 men) integrated into the Corps.
 Both units were established shortly after the end of World War II for deployment against the Indonesian nationalists.
 They had a precursor in the Corps Insulinde that during World War II conducted secret missions against the Japanese in the occupied Dutch East Indies.
 The KST, that would become a maximum strength of 1250 men, was composed of Dutch War Volunteers (OVW'ers), and Indo-European and native soldiers, including Moluccans.
 The formation, which in its aftermath was renamed Special Forces Regiment (RST) was succeed by the present KCT ( Dutch Special Forces )
The Special Operations Force (SOF) is the Republic's Army Special Forces composed of highly trained elite soldiers within the Singapore Armed Forces Commando Formation and an essential component of the joint special forces unit Special Operations Task Force (SOTF).
 According to the Principles of Special Forces, the Republic's special forces thrive on their exceptional qualities and advanced skills, consisting highly adaptive individuals who are independent and can operate independently, and the Republic's special forces soldiers cannot be mass-produced and must be managed carefully.
Z ( ) Special Unit—also known as Special Operations Executive (SOE), Special Operations Australia (SOA) or the Services Reconnaissance Department (SRD)—was a joint Allied special forces unit formed during the Second World War to operate behind Japanese lines in South East Asia.
 Predominantly Australian, Z Special Unit was a specialist reconnaissance and sabotage unit that included British, Dutch, New Zealand, Timorese and Indonesian members, predominantly operating on Borneo and the islands of the former Netherlands East Indies.