Mike:

I don't think there is any need for US military forces outside current NATO members . I don't think there is a need for any regular US ground forces in any of the front line NATO countries. They have plenty of guys who can fight and would be thrilled to have a crack at Ivan. There is a need for money, weapons and for the front line NATO countries, air cover. If Ivan goes into any part of the rest of Ukraine it may be an Unconventional Warfare jamboree. Those front line NATO nations and the Ukrainians have plenty of tough top flight guys who can handle everything in that country.

If the Poles don't act like Poles if Ivan keeps moving, I'll look for the sun to rise in the west, but they will need backup from us in the ways I've described.