Was there a real Hogan's Heros operation in World War 2?

There was no stalag 17 in Germany. The Stalags in Germany were for the enlisted military not the officers....they were in Oslags...oh now I can't remember how to spell that Word. Hundreds of POW's in Germany did try to escape. Some were successful and some were captured and returned to the POW camps. Others were killed while trying to escape. There were POW's that did dig their way out. Remember Hogan's Heroes is a comedy and not representative of the real POW camps. Some POW's were assisted by the Underground Resistance and made it back to England.