That's certainly some nuance there! I had in mind a more basic concept which due to legal restrictions in Germany maybe make thinking about it as part of German history and a geopolitical conflict likely to naturally reoccur is part of a Denkverbot.

But I think you should legally be able to answer if you can think of anything between 1914 and 1945 that is taught to Germans in schools that might cause younger Germans to feel some aversion towards preparing to fight a land war against russia in eastern ukraine? Anything that maybe resulted in the premature deaths of millions of young german men, initially volunteers who were solicited at the secondary school level?

Massive political differences and ultimate outcomes aside for each conflict, Germany becoming increasingly militarized has a poor track record when it comes to not getting extremely large numbers of teenage german boys killed in eastern Ukraine.