On 14 October 1953, the Sixth Allied Tactical Air Force was also established in Izmir, commanded by Major General R.E.L. Easton, USAF, and responsible to Allied Air Forces Southern Europe for the air defence of Greece and Turkey. Three national air Commands were assigned to it: the Turkish 1st and 3rd Tactical Air Forces, and the Greek Air Force's Royal Hellenic 28th Tactical Air Force. In terms of actual forces this meant two Greek wings and four Turkish fighter-bomber groups of F-84 aircraft, plus some B-26A Mosquitoes. Later in 1953, the various national naval forces within Allied Forces Mediterranean were organised into six Sub-Principal Subordinate Commands (Sub-PSCs), each commanded by an Admiral (including one French (MEDOC), one Greek, one Turkish, one Italian and two British). In time of war, CINCAFMED would be responsible for securing the Sea lines of communications throughout the Mediterranean Sea. Some of AFSOUTH's first exercises took place in 1952. Operation Ancient Wall was a series of military maneuvers involving ground small unit tactical training, land-based tactical air support, and carrier-based air support under the overall command of Admiral Carney. Exercise Grand Slam was a combined naval exercise held in the Mediterranean Sea between 25 February to 16 March 1952. The exercise included allied warships escorting three convoys of supply ships which were subjected to repeated simulated air and submarine attacks, as well as anti-submarine warfare (ASW) operations and naval gunfire shore bombardment. Operation Longstep was a ten-day naval exercise held in the Mediterranean Sea held during November 1952. It involved over 170 warships and 700 aircraft, and it featured a large-scale amphibious assault along the western coast of Turkey.  1953 AFSOUTH exercises included:  In 1957, Operation Deep Water simulated the defence of the Dardanelles from a Soviet attack. The exercise included an 8,000 strong amphibious landing. The drawdown of the British Mediterranean Fleet, the military difficulties of the politically-decided command structure, and the withdrawal of the French from the military command structure forced a rearrangement of the command arrangements in the southern region. Allied Forces Mediterranean was disbanded on 5 June 1967, and all forces in the south and the Mediterranean assigned to AFSOUTH. AFSOUTH continued to conduct exercises in the 1960s and 1970s, among which was exercise 'Dawn Patrol,' a five-nation naval and air exercise conducted throughout the Mediterranean in 1974.