SMS Hannover ("His Majesty's Ship Hannover") was the second of five Deutschland-class pre-dreadnoughts of the German Imperial Navy (Kaiserliche Marine). Hannover and the three subsequently constructed ships differed slightly in both design and construction from the lead ship Deutschland in their propulsion systems and slightly thicker armor. Hannover was laid down in November 1904 and commissioned into the High Seas Fleet in October 1907; this was ten months after the revolutionary "all-big-gun" HMS Dreadnought was commissioned into the Royal Navy. As a result, Hannover was obsolete as a capital ship before she was even completed; Dreadnought's more powerful main battery and higher speed would have made it unwise for a ship like Hannover to engage her in the line of battle. The ship was na