Austin Bay has some suggested hard-power responses we can make to Russia's annexation of Crimea. I particularly endorse the expansion of fracking and the exporting of American natural gas to Europe.
Russian hard-power aggression, annexation and expansion require a hard-power response. Here are some I recommend: (1) We can't flip-flop NATO Article 5, NATO's commitment to mutual defense. The U.S. must demonstrate it takes its NATO obligations seriously. So, deploy U.S. troops to Poland. The U.S. withdrew its last tanks from Germany in 2013. The Poland garrison needs a U.S. armor brigade. (2) Cancel all defense budget cuts. Faculty club snark aside, peace through strength means something. (3) Open federal lands to natural gas "fracking" and start shipping gas to Europe. Undermining Russian gas sales is a real economic sanction. (4) Arm the Baltic nations. They are also NATO allies. And (5) deploy the GBI's to Poland, and build a more robust missile defense system. As for permanently deploying U.S. Patriot PAC-3 short-range anti-missile missiles in Poland -- that's an idea whose time has come.