Let me parse this a bit.
I think most thinking people agree directly engaging Russia in Ukraine would be folly.
On the other hand, NATO was created through our leadership and in our national interest at the end of WWII. Since the end of the Spanish American War, the US had become a world power - more importantly a world economic power. Our economy and thus our security was and is dependent upon access to free markets, especially in Europe. Throughout the first half of the twentieth century we tried to ignore that and were dragged into two vast European wars because of it.
At the end of the second one, we were also facing an ascendent Soviet Union fueled by an aggressive ideology occupying half of Germany and essentially all of Central Europe. Both the Marshall Plan and NATO succeeded in rebuilding the Western Democracies and maintaining the peace in Europe throughout the Cold War and the chaos following the collapse of the Soviet Union. Needless to say, the emerging democracies of Central Europe were eager to flourish outside the dominance of Russia - whatever its government.
NATO has worked for three quarters of a century in the collective interests of the member countries. It’s success is the main reason it is called an anachronism by the neo-isolationists on the right and green socialists on the left. I am confident that the US and NATO will defend every inch of the alliance and the dictator in Moscow needs to fully realize it.
Those are indeed elements of the 4th Infantry (Mech), my old division, embarking on a planned deployment. We use to do that annually during the Cold War. This particular one is timely and I hope they move to Poland.
As
@Vashper notes just two brigades couldn’t stop a Russian incursion into Poland. But from what I have seen this month, I have no doubt each could destroy a Russian division handily. They know how and have tremendous experience in conducting combined operations.
No “retired” personnel have been notified about anything other than taxes are due. Every year, some reservists are activated for various deployments.