There are various ways to signal a yellow if not a red. Retired Admiral James Stavridis shared a few ideas in Foreign Policy magazine. Michael Barone has more. Parking destroyers in the Black Sea off Yalta might be a good place to start. The U.S. sent ships to that region when Russia invaded Georgia in 2008. The Russians didn't withdraw from occupied Abkhazia or South Ossetia, but at least they stopped where they were, withdrew from Gori, and left the capital Tbilisi alone.

Pity the Vassals of Moscow (4 March 2014)