I can understand why Putin ordered to take control of Crimea without official warnings, UN security consil meetings, etc. Most likely he did this to avoid a single shot, because if it were expected than armed militants from Western Ukraine could arrive there earlier than Russian troops and arrange some violent resistance. But I don't see any solid legal grounds that could back such actions besides permission from Yanukovich who still calls himself a legitimate president. In South Ossetia case our peacekeepers who stationed there by official UN mandate were killed and it's a legitimate reason for intervention but in the Crimea case I don't see such solid ground at all. Of course Crimea means million times more for an average Russian than whole Caucasus region but still... As I already wrote I want to hear an explanation form Putin who is supreme commader of our armed forces.