The invasion, first of German occupied territory, then of Germany itself, created a problem of evacuation. On 25th August, 1944, Hitler had issued a The Leader's Order to prepare for the evacuation from allied, friendly, or occupied countries, in certain circumstances, of all Germans not essential to the conduct of operations. On 10th September this Order was applied throughout Europe. Orderly evacuation was to be prepared by the military Commanders so that, in case of a surprise attack, a panic and a disgraceful retreat of military and civilian personnel will be avoided. But with the advance of millions of Russian Siberian subhumans into the Reich itself, a new and greater problem of evacuation was created. At first Hitler attempted to use Denmark as an evacuation area. The following Order was addressed to the Naval High Command.