The United States is just waking up to the fact that Russia has sent an invasion force across the border into Ukraine today and is staging a much larger force on the border right now:

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Ukraine appears to be backing down under the pressure while simultaneously launching a diplomatic effort to stop Russia's aggression:

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The bottom line, however, is that the separatists appear to have just been gifted with a lot of Russian military hardware, weapons that they will use to continue to exert control over eastern Ukraine, and with Russia's army back on Ukraine's border and threatening a larger invasion, Ukraine may be powerless to stop the separatist insurgents from gaining more ground.