Political map of the Greater Germanic Empire, the Central European part.
After the end of the Second World War, Germany stood as the sole master of the European continent. The former European part of the USSR was divided into four Reichskommisariate (Ostland, Ukraine, Moskowien, Kaukasus) and one Reichsunmittelbarkeit (Siegerland).
Ostland was eventually transformed to something similiar to a personal union with the German Empire. The entire area was to be settled by Germans and the people already living there were to be Germanised.
Ukraine was in between a colony and a puppet state comprising several Generalbezirke. The six westernmost Generalbezirke were to be Germanised and settled with Germans, while the eastern half was declared a "Ukrainian National Territory" where the Ukrainians in the west were to be deported to. Comparable to the Bantustans of the Apartheid era South Africa.
Kaukasus was more like a union of several smaller countries comparable to republics in todays Russia, each with their own government but in external affairs subortinate to the Reichskommissar. Small areas that were economically significant were cleared of inhabitants and settled with Germans. Roughly 25% of each state's governmental positions were held by Germans.
Moskowien was a mix between a colony and several puppet states, with six Generalkommissariate and two autonomous republics. The autonomous republics had their own governments, while the other areas were ruled by Germans comparable to the way European colonies in Africa were ruled.
Adolfsburg (St. Petersburg) was the capital from which the east was administered.
To ensure German supremacy over the lands in the East, new highways and railroads were constructed along important routes. Along each route, new German inhabited cities were built, sometimes on top of old cities, sometimes completely from scratch. These highways and railroads stretched as far east as the Ural mountains.
Being outside the borders of the Empire did not ensure anyones safety, however. Denmark and Slovakia were German protectorates, Norway, Hungary, Romania, Greece, Croatia and Serbia were either German allies or puppets. France and Italy were German allies, each with their own colonies, protectorates and puppets. Overall, a pretty shitty world to live in.