Found this image earlier. Seems appropriate.
EDIT: Also, is it just me or is the title woefully misleading? They did not "declare war" they sent a few troops, the reason being as one newspaper published "the Prime Minister of Crimea claimed control of all military, police and other security services in the region and appealed to Mr. Putin for help in keeping peace there." The prime minister of Crimea Sergei Aksenov urged Putin to send troops by saying "“Understanding my responsibility for the life and security of citizens, I appeal to the President of Russia Vladimir Putin for assistance in guaranteeing peace and calmness on the territory of the autonomous republic of Crimea,”"
The US secretary of the state Mr John Kerry put it quite well in his statement (link-
http://www.dailymail.co.uk/news/article ... rport.html Scroll down to see it)
He mentioned that "We were told that they (Russia) are not engaging in any violation of the sovereignty of Ukraine and do not intend to"
Although we can't really trust Putin..cuz well Putin.
Please help me out if I misinterpreted anything.