 Complete the following phrase:  In the first year of World War I, Andrei Pervozvanny and Imperator Pavel I formed the core of the Baltic Fleet. For most of the war they remained moored in the safety of Sveaborg and Helsingfors. Idle, demoralized ratings subscribed to Bolshevik ideology and on took control of the ships in a violent mutiny, killing many of their officers in the process. The battleships participated in the 