 Complete the following phrase:  Following the wave of declarations of war between the major European powers at the end of July and early August, Britain declared war on Germany on 5 August. Prinz Heinrich was reactivated for wartime service the same day, and she then went into the shipyard in Kiel for preparation work. She was then assigned to the defenses of the port in advance of an expected British attack on Kiel on 2526 September. When that failed to materialize, Prinz Heinrich was assigned to III Scouting Group, part of the High Seas Fleet. From 8 November to 14 April 1915, Prinz Heinrich was primarily occupied with guard duty in the Jade Bay and the river Ems. During this period, she participated in the second major German offensive in the North Sea, the 