Russia

This post was updated at 1:20 p.m. ET.

Russian forces appear to be digging in after seizing key assets in the Ukrainian republic of Crimea, and despite tough talk from Kiev's new leaders, the former Soviet satellite's under-manned and under-equipped military is no match for Moscow's battle-tested troops, experts say.

This post was updated at 4:50 p.m. ET.

Russia's parliament has unanimously approved a request by President Vladimir Putin to authorize the intervention of Moscow's forces in Ukraine until "the normalization of the political situation" there. In response, Ukraine put its own forces on alert and warned that a Russian invasion would spark war between the two countries.