Borsook wrote:BTW an argument about what was before 1918 is a slippery one, using this logic we should have only German and Russian names used for Polish cities...
I think you miss the point here. Posen and Danzig were annexed into greater Germany and military districts were formed there to be used as recruitment centers. Polish people in the areas were driven away and Germans moved in. So many German soldiers were actually recruited from the cities. So for the game purposes Posen is a GERMAN city and not a Polish city.
Here is some info about what the Germans did with Wartheland:
After the invasion of Poland, the conquered territory was partitioned among four different Reichsgaue and the General Government area further east. Militärbezirk Posen was created in September 1939 and as Reichsgau Posen annexed by Germany on 8 October 1939, with SS Obergruppenfuhrer Arthur Greiser as the only Gauleiter. The name Reichsgau Wartheland was introduced on 29 January 1940.
The Wehrmacht established Wehrkreis XXI based at Poznań. This Wehrkreis was under the command of General der Artillerie Walter Petsel, and its primary operational unit was the XXXXVIII Panzer Korps. Poznań was responsible for the Militärische Unterregion-Hauptsitze at Poznań, Leszno, Inowrocław, Włocławek, Kalisz, and Łódź. It maintained training areas at Sieradz and Biedrusko.
In the Wartheland, the Nazis' goal was complete "Germanization", or political, cultural, social, and economic assimilation of the territory into the German Reich. In pursuit of this goal, the installed bureaucracy renamed streets and cities and seized tens of thousands of Polish enterprises, from large industrial firms to small shops, without payment to the owners.
The Germanization of the annexed lands also included an ambitious program to resettle Germans from the Baltic and other regions on farms and other homes formerly occupied by Poles and Jews. By the end of 1940, the SS had expelled 325,000 Poles and Jews from the Wartheland and the Polish Corridor and transported them to the General Government, confiscating their belongings. Many elderly people and children died en route or in makeshift transit camps such as those in the towns of Potulice, Smukal, and Toruń. In 1941, the Nazis expelled a further 45,000 people, and from autumn of that year they "began killing Jews by shooting and in gas vans, at first spasmodically and experimentally."[1] Greiser wrote in November 1942: "I myself do not believe that the Führer needs to be asked again in this matter, especially since at our last discussion with regard to the Jews he told me that I could proceed with these according to my own judgement."[2] By 1945 nearly half a million Volksdeutsche Germans had been resettled in the Gau.