In December of 1989, a revolution in Romania brought down the Communist government that was in power there, and ended Romania's membership in the Soviet-led Warsaw Pact. The Warsaw Pact was formally disbanded on Feb 25, 1991. Romania joined NATO on March 29, 2004.
On March 24, 2010, the government of Romania approved the purchase of 24 refurbished F-16C/D Block 25 aircraft from the USAF inventory. But the Romanian government failed to pay the first installment on the aircraft, and the deal fell through.
On September 27, 2012, the Romanian government approved a plan to buy 12 used Block 15 MLU F-16s from Portugal, and were scheduled to enter service in 2016. These were primarily intended to replace the Soviet-era MiG-21s currently in service with the Romanian Air Force. The Romanian government would like to buy 12 more F-16AM/BM in 2020 to equip a second squadron. In 2025, they would like to buy 24 Block 50 F- 16s.