 The Ministry of Defence accepted the project on 5 August 2014, and the first two aircraft were officially handed over to the 831st Tactical Aviation Brigade in October 2015.During the post-Euromaidan Ukrainian crisis of 2014, a Ukrainian Air Force Su-27 was scrambled to intercept Russian fighter jets over Ukraine's airspace over the Black Sea on 3 March.With no aerial opposition and other aircraft available for ground attack duties, Ukrainian Su-27s played only a small role in the (ongoing) War in Donbass.