sentences:  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 operation to bombard Hartlepool on 15–16 December 1914.