Conversation so far:
what happened to eastern europe as a result of world war i
In the immediate aftermath of WWI, defeat drove cooperation between Germany and the Soviet Union but ultimately these two powers would compete to dominate eastern Europe.
how are relations between germany and russia today
Germany–Russia relations display cyclical patterns, moving back and forth from cooperation and alliance to strain and to total warfare.
when were germany and russia friendly
Russia helped liberate Germany in 1812–15 in the Napoleonic Wars, and the two were generally friendly for a century.
how friendly were germany and russia after the cold war
Since the end of the Cold War and German reunification, in 1989-91, Germany and Russia have developed a Strategic Partnership regarding energy trade.

Question: when did the countries fight
Self-contained rewrite: when did germany and russia fight