Sukhoi Su-34 were delivered on 18 July 2014. 18 aircraft were delivered in 2014, and 20 planned to be delivered in 2015. It is intended to replace the Sukhoi Su-24 and the Tupolev Tu-22M3. Sukhoi has delivered the first batch of Su-34s to the Russian Ministry of Defense under the 2015 order on 21 May 2015. On 16 July 2015, the Sukhoi Company handed over another batch of Su-34 frontline bombers to the Ministry of Defense of the Russian Federation. The transfer took place in the framework of the Unified Military Hardware Acceptance Day in the Sukhoi Company's branch — V.P.Chkalov Novosibirsk
Sukhoi Su-15 the Su-15 was abruptly retired from the new Russian Air Force in 1993 to comply with the Treaty on Conventional Armed Forces in Europe. Most were hastily scrapped in favour of more advanced interceptors, including the Su-27 and MiG-31, but some are in reserve storage for emergency use. In Ukraine, the last Su-15s (at Kramatorsk and Belbek) were withdrawn from use in 1996. Some Western reports indicate that the Su-15TM was also designated Su-21 and the Su-15UM Su-21U. These reports are apparently incorrect. Designation Su-21 was reserved for Su-17M4 but never used. Sukhoi Su-15 The Sukhoi Su-15 (NATO reporting name: