The Citizens United v. Federal Election Commission Supreme Court ruling has left an indelible mark on U.S. politics. Since the January 2010 ruling outside groups and organizations have been able to promote their own special interests with neither accountability nor transparency. In the past three years, we've seen a flood of secretive money, the formation of super PACs and little done in the way of policy to reveal the source of the funding. Our timeline breaks events into four categories: Courts (major court rulings and cases), Disclose (legislation around greater disclosure of political contributions and spending), Super PACs (trend and news for independent expenditure only committees) and FEC (decisions made by the Federal Election Commission).