User blog comment:TheKnightOfOyashiro/BF3 expansions announced/@comment-402843-20120309131951/@comment-2224289-20120310231920

^The MP comes from the US's declaration of war on Russia due to the events of the singleplayer campaign. Given that they find out the linking of the nukes to the Russians, they declared war. Given that's November 2014, it'd reach 2015 with ease.