At the end of the cold war both Washington and Bonn promised Gorbachev that if Soviet forces withdrew from Eastern Europe there was no chance NATO would move eastwards. So NATO should never have moved east.
There should be no question of any western forces east of Germany.
It was lunacy on our part to expand NATO into the former Warsaw Pact nations and into parts of the former Soviet Union itself. Its as if some are gunning for all out war.