(printable PDF version) (HTML version) by Carl Conetta, PDA Briefing Memo #39, 09 January 2006. There is no reason to believe that a marginal increase in the US troop presence in Iraq will turn the tide there. The memo reviews relevant data on troop strength, insurgent activity, and Iraqi public opinion. It traces America’s troubles in Iraq to the nature of the mission, which it concludes is founded on strategic error.