Poland’s foreign minister, Radoslaw “Radek” Sikorski, has been intimately involved in the Ukraine crisis, including in the negotiation of an agreement in February that then-Ukrainian President Viktor Yanukovych walked away from, further fueling the Maidan protest.

From Kiev to Damascus, Moscow to Caracas, there are very few international conflicts and debates where the actions and position of the United States is not influential. In Ukraine, the United States stands solidly behind the interim government, and slapped some sanctions on Russian officials after Moscow annexed Crimea.

The United States plans to carry out small ground-force exercises in Poland and Estonia in an attempt to reassure NATO’s Eastern European members worried aboutRussia’s military operations in and nearUkraine, Western officials said Friday.

The United States, Russia, Ukraine and the European Union reached an agreement here on Thursday evening that calls for armed pro-Russian bands to give up the government buildings they have seized in eastern Ukraine and outlines other steps to de-escalate the crisis.

Russian President Vladimir Putin has warned Ukraine is "on the verge of civil war." The Kremlin said Putin made the comment in a telephone call with German Chancellor Angela Merkel on the situation there.

Despite much diplomatic effort, the situation in Ukraine worsens. A coordinated Russian campaign, including an invasion threat, special operations destabilization in eastern Ukraine patterned on the Crimea model, and warnings of gas cutoffs document ever more clearly Vladi­mir Putin’s aim to cripple the Ukrainian government and control much or even all of this strategically vital European country.

More than two decades after the Cold War supposedly came to a peaceful conclusion,Russia’s encroachment on Ukrainian sovereignty and its outright annexation of Crimea have occasioned a retro flashback. A byproduct of this geopolitical turmoil is NATO’s renewed importance to foreign policy.