Russia's 19th Century-style foreign policy prompts 16th century response
http://en.wikipedia.org/wiki/Lithuanian%E2%80%93Polish%E2%80%93Ukrainian_Brigade
Recent actions by Russia seem to have caused Poland, Lithuania, and Ukraine to dust off defunct plans to create a joint force for peacekeeping duties, an idea that had gotten shelved several years ago.
What's interesting is that these three nations more or less correspond with the borders of the Polish-Lithuanian Commonwealth, Russia's 16th century nemesis. What's more interesting is that it seems more aimed at NATO ("look what we have to do when you don't give us the protection we need"😉 than it is at Russia, who in a straight up fight could steamroll all three of these countries combined if it had to.