SMS Gneisenau
SMS "Gneisenau" was an armored cruiser of the German navy, part of the two-ship . She was named after August von Gneisenau, a Prussian general of the Napoleonic Wars. The ship was laid down in 1904 at the AG Weser dockyard in Bremen, launched in June 1906, and completed in March 1908, at a cost of over 19 million goldmarks. She was armed with a main battery of eight guns, had a top speed of , and displaced at full combat load.
SMS Undine
SMS "Undine" was the last member of the ten-ship , built by the Imperial German Navy. She was built by the Howaldtswerke shipyard in Kiel, laid down in 1901, launched in December 1902, and commissioned into the High Seas Fleet in January 1904. Armed with a main battery of ten guns and two torpedo tubes, "Undine" was capable of a top speed of .