None of those countries has any battle plan beyond “cry to U.S./NATO for help.”
The Poles and Germans will join their coalition. Once they directly engage Russia and get whacked, the “Western Alliance” will get the band back together.
If you mean the Baltics they don’t have much population to work with, Latvia is about 1.9 million people, Lithuania 2.8, Estonia 1.3., all three nations put together equal about the Atlanta metro area.
“Latvia—The current objective is to increase the number of personnel involved in defense and the active reserve service up to 31,000. Lithuania has announced plans to substantially increase its active military reserves to 36,000 and further increase its prepared reserve of military personnel to reach nearly 120,000 by 2025. Additionally, Estonia has increased its wartime military personnel structure up to 43,700.”