The US administration announced in January that it was going to send an extra 21,500 troops to Baghdad and Anbar province west of the capital. Since then, the
Pentagon has said that it will send a further 7,000 support troops of whom 2,200 will be military police, to handle an increased number of Iraqi detainees.
http://news.independent.co.uk/world/...cle2341357.ece
So that makes a total of 28,500 extra troops for the re-occupation of Iraq.