Stalag XVIII-D (also known as Stalag 306) was a German Prisoner of War camp at Maribor (German: Marburg an der Drau) in what is now Slovenia. It opened in the spring or early summer of 1941, operating until the end of the war. By July 1941 Stalag XVIII-D contained nearly 4,500 British and Commonwealth prisoners captured in Greece and Crete. Conditions initially were very poor, with more than 1,000 men accommodated in tents while huts were being constructed. There was an outbreak of typhus in early 1942. However the situation improved as the war went on.