Sergei Yeliseyev (admiral)
Sergei Yeliseyev is a Vice Admiral, former First Deputy Commander of the Ukrainian Navy who defected to Russia in 2014 during Russian annexation of Crimea.
He graduated from a Soviet naval school in Kaliningrad in 1983 and previously served with the Russian Pacific Fleet.
In 1993 Yeliseyev joined the Ukrainian Navy and in 1999–2001 he was a commander of Ropucha-class landing ship U402 Kostyantyn Olshanskyi.
In 2004, he graduated from the National Defense Academy of Ukraine.
In 2010 he was appointed the First Deputy Commander of the Ukrainian Navy.
From 19 February - 1 March 2014, Yeliseyev was an acting Commander of the Ukrainian Navy as the First Deputy Commander. In early 2014, he left the military oath of the Ukrainian Armed Forces and sided with the Russian Federation against Ukraine along with another high-ranking military officer Denis Berezovsky in the wake of the Crimean Crisis. Since July 2014, he has been serving as a Deputy Commander of the Russian Baltic Fleet.
In August 2014, the Military Prosecutor's Office of Ukraine accused Eliseev of treason and desertion.
