Kriegreich, alongside Ostrand, seems to based on the real-world German Empire. The ruler, Schledorf, appears to be based on real life General Schlieffen (who had died prior to the events of the First World War).
If previous sectors acquired by negotiation:
Willkommen! We have to fight a costly war. We are willing to enter negotiations for the goods we need.
If at least one sector taken by force:
Halt! Don't take one more step - withdraw your troops immediately. We are in no need of another war.
My people know war. You will see!