High Quality Content by WIKIPEDIA articles! SMS Rheinland ("His Majesty`s ship Rhineland") was one of four Nassau-class battleships, the first dreadnoughts built for the German Imperial Navy (Kaiserliche Marine). Rheinland mounted twelve 28 cm (11 in) main guns in six twin turrets in an unusual hexagonal arrangement. The navy built Rheinland and her sister ships in response to the revolutionary British HMS Dreadnought, which had been launched in 1906. Rheinland was laid down in June 1907, launched the following year in October, and commissioned in April 1910.