It checks perfectly. Germany isn't part of the eastern flank, Poland is. Germany has absolutely no need to have US soldiers stationed in their territory. They'

It checks perfectly. Germany isn't part of the eastern flank, Poland is. Germany has absolutely no need to have US soldiers stationed in their territory. They're fully capable - in all regards - of defending their own nation. Adding soldiers to Poland is strengthening the eastern flank because Poland is in Eastern Europe, Germany is not. If the US removes 100% of its soldiers from Germany and adds only 3,000 to Poland, that also would be strengthening the eastern flank.