Ouvrage Simserhof is a "gros ouvrage" of the Maginot Line, located in the French commune of Siersthal in the Moselle department. It faces the German border and is adjoined by the "petit ouvrage" Rohrbach and the "gros ouvrage" Schiesseck. Located 4 km west of Bitche, the "ouvrage" derived its name from a nearby farm ("Hof" in German). It was part of the Fortified Sector of Rohrbach. During the Battle of France in 1940, the Simserhof supported its neighboring fortifications with partially successful covering artillery fire. After the surrender of France, it was repurposed by the Germans as a torpedo storage depot, and later resisted the American advances of late 1944. The Americans briefly occupied the fort in the first days of 1945 until the German counter-offensive of Operation Nordwind, which allowed them to take back control of the Simserhof. The fort was finally liberated by the 100th Infantry Division on March 15, 1945. Following the war, it was initially repaired for the French Army and later converted into a Maginot Line museum in the early 1960s. Retained by the Ministry of Defense, Simserhof now functions as a museum, and has the most extensive visitor infrastructure of any of the preserved Maginot fortifications.