Why did himmler opt to march prisoners out of the camps, rather than simply liquidating the camps as had occurred during operation reinhard?

Himmler wanted to extend the Nazi rule throughout places and so he decides to bring about the idea of the death march of prisoners rather than liquidating the camps

Explanation:

The Reinhard Operation was the code name to the secretive operation that was carried on by the Germans to exterminate Poland's Jews from the general government district of Poland which was occupied by the Germans.About two million Jews were sent to Belzec, Treblinka, and Sobibor.In the summer of 1944, the massive soviet union annihilated the German army group center.Soviet union overran Nazi concentration camps Lublin/Majdanek.Heinrich Himmler ordered the prisoners in all camps to be forcibly evacuated to the Reich. he evacuated the prisoner this way due to these purposes.The SS chief Himmler did not want the prisoners to reach the hands of the enemy as they would say stories to allied and soviet liberators.they thought it was the prisoner's responsibility to maintain armaments wherever possible.Himmler wanted to use these  Jewish prisoners as hostages and wanted to negotiate peace using them in the west that would confirm the survival of Nazi rule

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