 Complete the following phrase:  After her completion Petr Veliky was assigned to the Gunnery Training Detachment through 1917. A number of sources report that she was renamed by the Soviets as Respublikanets Republican or Barrikada Barricade, but this is not confirmed by the post-Cold War sources used by McLaughlin. That year she was assigned as a depot ship for submarines at Kronstadt and later Helsinki. The Treaty of Brest-Litovsk required the Soviets to evacuate their naval base at Helsinki in March 1918 or have their ships interned by newly independent Finland even though the Gulf of Finland was still frozen over. Petr Veliky reached Kronstadt in April in what became known as the 