 Complete the following phrase:  After their crews arrived to take them back to Austria-Hungary in early 1886, both vessels were taken into the navys shipyard in Pola, where their armament was installed over the course of 1887, to include their torpedo tubes. Both ships took part in the Barcelona Universal Exposition, which saw a squadron of ironclads and cruisers sent to represent Austria-Hungary at the opening ceremonies. Coincidentally, both ships ran aground during training operations in late June 1888. The two cruisers spent much of the early 1890s laid up, with Panther being reactivated in 1896 for a major training cruise in the Pacific Ocean from May 1896 to February 1898, and Leopard returning to service in 1897 to participate in an international naval demonstration off the island of Crete during the 