You can only push the Russians so hard around what is clearly their own neighborhood.

Just prior to WW2 the British and French encouraged Poland in being aggressive against both Germany and the Soviets, although there was longstanding issues with the Soviets over the 1920 invasion of Poland, which hammered the Soviets enough to make them indefinitely scrap their plans for overrunning Europe.

If I remember correctly, before the Soviets broke the back of Nazi Germany, the old Russians had pretty well concluded British Imperial conquests in the old world by fucking up the Brits in Crimea. After that, the Britsh never again fought an offensive war in Europe. The Britsh glorify WW2, but let's face it, they didn't fight until their backs were pressed to the wall. WW1, similar basic story and in both cases, they went recruiting family help from the beefy nephews in the former colonies.