 Complete the following phrase:  At the outbreak of war in July 1914, Schleswig-Holstein was assigned to guard duty in the mouth of the Elbe River while the rest of the fleet mobilized. In late October, she and her sisters were sent to Kiel to have improvements made to their underwater protection system to make them more resistant to torpedoes and mines, after which II Battle Squadron rejoined the fleet. The squadron covered Rear Admiral Franz von Hippers battlecruisers of the I Scouting Group while they 