 The Entente powers landed troops in Salonika in 1915, which was a source of tension between France and Greece.In October 1916, "Hydra" and a pair of torpedo boats defected to the Venizelist faction in the National Schism.Ultimately, the French seized the Greek Navy on 19 October; the heavy units of the Greek fleet were disarmed and placed in reserve for the remainder of the war.