
Ukrainian troops stepped up patrols on the Russian border in an attempt to pre-empt any further land grabs by the Kremlin in the country's east and south.
Following a speech Tuesday to the Russian Federal Assembly, President Vladimir Putin signed a treaty annexing Crimea.
US Vice-President Joseph Biden responded by accusing Russia of a "blatant violation of international law" and making a "brazen military incursion." The US was considering deploying ground troops to the Baltic States on new military exercises, he threatened.
Hours later, Ukrainian Prime Minister Arseniy Yatsenyuk told his defence ministry that the conflict in Crimea had entered a military phase. Yatsenyuk accused Russian forces of killing a Ukrainian serviceman at a base near the Crimean regional capital, Simferopol, calling the incident "a war crime." Ukraine then authorised its troops to fire in "self-defence."
Provocations to legitimise war need not take place only within Crimea. They could be staged throughout eastern Ukraine.













