War Aims of a Communist Germany

Inspired by the thread asking about the war aims of a fascist Russia. Let's say the Spartacus League is successful during the German Revolution of 1918-1919, and that a communist regime is established in that country by the end of 1919 (with the possible exception of East Prussia, which I imagine could be a conservative, Junker-dominated breakaway state).

So, the next time Germany gets into a war with the other great powers in this scenario, what exactly would their goals be, beyond preserving their communist regime? Would they merely seek to annex other German-speaking areas, like Austria and the Sudetenland? How about some communist version of Mitteleuropa, with satellite communist regimes established in Poland, Czechoslovakia, Hungary, and the rest? Anything more grandiose?

Assuming the communists still succeed in Russia and the Soviet Union is still established, would they have friendly relations with a communist Germany, or would the two regimes have differing goals such that they would like still end up fighting, despite their ideological similarity? (I'm assuming war between a communist Germany and any sort of non-communist Russia is essentially inevitable.)

Would such a Germany have any particular designs on the south and west - France, Italy, the Benelux countries?
 
The war aims of a Spartacus Legue Germany that went red in 1918 will obviously be to survive the inevitable Entente intervention/invasion (depending on how powerful opposition groups are) to crush the revolution.
 
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