Ukraine’s military intelligence: as of May 2016, nearly 23.9 thousand troops, 613 tanks and combat armored vehicles, 162 artillery systems, about 101 fighter jets, 56 helicopters, 16 coastal missile systems, 34 ships and 4 submarines are located on the temporarily occupied territory of the Autonomous Republic of Crimea.
Russia is significantly increasing its combined military grouping in the occupied Crimean peninsula. 27th air force division was deployed in the peninsula in addition to the existing marine aviation of the Russian Black Sea Fleet.
MFA of Ukraine shared on Facebook:
'On 25 May - 8 June 2016 all-Russia army competition of flying crews 'Avaiadarts-2016' is taking place in the occupied Crimea. Up to 70 tactical aviation aircrafts are to participate in the competition, 58 of them were redeployed from the Russian territory to Belbek, Kirovske and Saky air bases. Long-range aircrafts TU-22M3 from the 22nd heavy bomber aviation division and military transport aircrafts will also take part. Performances of the most aircrafts redeployed to the peninsula allow attaining combat tasks in the air space of the Black Sea region countries.
Ukraine urges international community to step up pressure on Russia and its leadership in order to stop occupying the Crimean peninsula, stop militarising it and restore the territorial integrity of Ukraine within its internationally recognized borders.'
The Ukrainian territory of Crimea was annexed by the Russian Federation on 18 March 2014. From the time of the annexation, Russia has de facto administered the peninsula as two federal subjects - the Republic of Crimea and the city of Sevastopol - within the Crimean Federal District.
The annexation followed a military intervention by Russia in Crimea, which took place in the aftermath of the 2014 Ukrainian revolution and was part of wider unrest across southern and eastern Ukraine.