A historical parallel and the BEF. Established after the Austrian Anschluss and after Munich. Compared to the annexation of Crimea and support of rebels in E Ukraine. Okay so far. The BEF didn't deploy until September/October 1939 after war was declared. Britain, Germany, the US, Canada, France, Italy etc. for the most part are pre-positioning forces prior to any outbreak of war. If the BEF had deployed in 1938, a parallel may be drawn. For all we know that deployment may have made Germany think twice about the invasion of Poland. I doubt it personally but Vlad now knows that in attacking NATO member states he is also attacking other member states armed forces. As for the size of the forces, more than a road bump, but not enough for him to go squealing about a possible invasion force.