I did a Google search and Wikipedia (
http://en.wikipedia.org/wiki/Stalag_IV-A) cites a Book written in German
http://www.elsterhorst.de/ Here is the time line from the book for the camp:
*Spring 1938 the building of the camp was started to house about 350 Czech prisoners who originally lived in tents during construction.
*October 1939 Polish prisoners arrived from the September 1939 invasion of Poland. Finally 40 huts were built[1].
*June 1940 the camp was divided, part of it became Oflag IV-D for Belgian. British, and French officers. Also a separate part of the cazmp was set aside as hospital for prisoners Reserve Lazarett 742.
*May-June 1941 the Polish prisoners were transferred to other camps. In their place came Greek and Yugoslavian prisoners from the Balkans Campaign.
*June-September 1941 Soviet prisoners from Operation Barbarossa were placed in another separated camp. Conditions were appalling, starvation, epidemics and ill-treatment took a heavy toll of lives. The dead Soviet prisoners were buried in mass graves at the cemetery in neighboring Nardt.
*May 1945 the camp was liberated by the Red Army. Before that many prisoners had been marched south-west.