"This is gravely concerning," said William Alberque, a former director of NATO's Arms Control, Disarmament and WMD Non-Proliferation Center.

Despite the strong show of support for Ukraine at recent summits ... the ambitions of its Strategic Concept from 2010. Only military intervention will secure peace and the rule-based world ...

The war in Ukraine is increasingly drawing comparisons to the two-decade US intervention in Afghanistan, with both conflicts characterized by massive financial commitments, heavy reliance of local forces on Western aid,

American military aid to Ukraine has ... ability to strike vital Russian facilities quickly and effectively. Impressively and somewhat surprisingly, the kind of intervention that the U.S. has ...

Russia’s army has made fast progress in Ukraine over the past week, seizing 90 square miles of territory and making military advances at the fastest clip since invading its western neighbor ...

Defying mass popular opposition to a military escalation threatening total war with Russia, London and Paris are planning a large-scale ground intervention in Ukraine. These plans, discussed ...

Ukraine had a sizable Russian minority ... in the “near abroad” or new republics would be grounds for military intervention. After the press conference, Dmitro was somber.