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 Irene
SMS "Irene" was a protected cruiser or "Kreuzerkorvette" of the German Imperial Navy ("Kaiserliche Marine") and the lead ship of the . She had one sister, ; the two ships were the first protected cruisers built by the German Navy. "Irene" was laid down in 1886 at the AG Vulcan shipyard in Stettin, launched in July 1887, and commissioned into the fleet in May 1888. The cruiser was named after Princess Irene of Hesse and by Rhine, sister-in-law of Kaiser Wilhem II. As built, the ship was armed with a main battery of fourteen guns and had a top speed of .