Russia bought the last of TU-160 bomber from Ukraine in 1981 --see 7:00 in vid--- and have recently revamped to most powerful bombers on Earth.
Apparrently a Russian defector came over from our southern border recently with inside info on this bomber as he was part of the engineering or planning process.
In addition Germany has 6 of the most advanced submarines on Earth, and could supply Ukraine with one in Black Sea. ----see 2:25 in vid--