In February and March 2009, the Obama Administration announced its overall plans to increase troop levels in Afghanistan and decrease troop levels in Iraq for 2009 through 2011. Using several Department of Defense (DOD) data reports, this report describes, analyzes, and estimates deployed troop strength from the 9/11 attacks to FY2012 to provide Congress with a tool to assess current and future DOD war funding requests; implications for the U.S. military presence in the region; and deployment burdens on individual service members and each of the services.

This report gives a summary of the usage of the War Powers Resolution (WPR) and various issues related to proposals to modify or repeal the resolution. The report summarizes most recent developments and background, and gives an overview of United Nations actions, and WPR activities in former Yugoslavia/Bosnia, Kosovo, Iraq (post-1991), Haiti, and Somalia. It also includes commentary on the instances formally reported under the WPR, consultation with Congress, and the current issues which Congress is considering.