In June 1948 Yugoslavia broke off relations with the Stalinist Soviet Union. The country was immediately subjected to extreme political pressure from the Soviet Union and its Balkan neighbours, and the JRV's previous sources of aircraft, spares and fuel were cut off.
In 1951 the Yugoslav Chief of Staff, Colonel-Genera l
Koča Popović, visited the United Kingdom to discuss the situation. It was agreed that a substantial shipment of aircraft would be forthcoming. In October 1951, the first
de Havilland Mosquito F.B.6 fighter-bombers were supplied. The following year, 150 Republic
P-47D Thunderbolt fighter-bombers were delivered from the USA under a Mutual Assistance Pact.
The first jet aircraft to be operated by the JRV, four
Lockheed T-33A jet trainers, arrived on 10 March 1953 and were soon followed by the first of 229
Republic F-84G Thunderjet fighter-bombers. Serials for the Thunderjets were from 10501 to 10729. The first eight Thunderjets, all former 48 TFW aircraft, arrived at Batajnica on June 9, 1953. At the same time, a number of Yugoslav pilots underwent jet flying training in Germany and Colorado, USA. These deliveries substantially improved the combat effectiveness of the JRV. Ten
Westland Dragonfly helicopters were obtained in 1954, and in 1956, after numerous delays due to political considerations, 121
F-86E/Canadair CL-13 F.4 Sabres interceptors were delivered.
The Yugoslavian Air Force operated 219 F-84Gs from June 1953 until 1974.