The final version of "Generalplan Ost", essentially a grand plan for ethnic cleansing, was divided into two parts: the "Kleine Planung" ("Small Plan"), which covered actions which were to be taken during the war, and the "Grosse Planung" ("Big Plan"), which covered actions to be undertaken after the war was won (to be carried into effect gradually over a period of 25–30 years). The Small Plan was to be put into practice as the Germans conquered the areas to the east of their pre-war borders. The individual stages of this plan would then be worked out in greater detail. In this way, the plan for Poland was drawn up at the end of November 1939.