The Austro-Hungarian Navy (Kaiserliche und Königliche Kriegsmarine, shortened to k.u.k. Kriegsmarine) built a series of battleships between the early 1900s and 1917. To defend its Adriatic coast in wartime, Austria-Hungary had previously built a series of smaller ironclad warships, including coastal defense ships, and armored cruisers. The appointment of Admiral Hermann von Spaun to the post of State Secretary of the Navy in 1897 accelerated naval construction and under the command of Franz Joseph I of Austria, the k.u.k. Kriegsmarine began a program of naval expansion at the beginning of the 20th century. The navy immediately pushed for the construction of the three Habsburg-class battleships, after which soon followed three of the Erzherzog Karl class, all of which were pre-dreadnoughts.