Sergei Yeliseyev is a Vice Admiral, former First Deputy Commander of the Ukrainian Navy who left Ukrainian military service in favor of Russia in 2014. In 19 February – 1 March 2014 Yeliseyev was acting Commander of Ukrainian Navy as the First Deputy Commander. Early in 2014 during the Crimean Crisis along with another high-ranking military officer Denis Berezovsky, he left the military oath of the Ukrainian Armed Forces and sided with the Russian Federation against Ukraine. Since July 2014 he serves as a Deputy Commander of the Russian Baltic Fleet.
References
Sergei Yeliseyev (admiral) Wikipedia(Text) CC BY-SA