From the Summary: "As interest in troop level deployments continues, President Bush announced in a February 15, 2007 speech the Administration's plans for an increase in U.S. forces in Afghanistan, including a planned gradual increase of 3,200 U.S. troops on the ground in the coming several months. This report provides official Department of Defense (DOD) statistical information on U.S. forces now serving in Afghanistan with comparisons to earlier force levels. It also provides brief official information on the military units extended or scheduled for the next rotation of duty into Afghanistan. As of September 1, 2007, according to DOD, the United States had 24,056 troops stationed in Afghanistan -- 20,775 active component and 3,281 National Guard or Reserves. They are serving in two missions -- a NATO-led peacekeeping mission and a separate U.S.-led combat effort called Operation Enduring Freedom (OEF). For security reasons, DOD does not routinely report the composition, size, or specific destination of military forces deployed to the Persian Gulf. This report will be updated upon receipt of new DOD data. For additional information on U.S. forces, see CRS [Congressional Research Service] Report RL30588, 'Afghanistan: Post-War Governance, Security and U.S. Policy' by Kenneth Katzman, and CRS Report RL33503, 'U.S. and Coalition Military Operations in Afghanistan: Issues for Congress', by Andrew Feickert."
CRS Report for Congress, RS22633