The expansion will be achieved by sending about 1,500 troops from the 82nd Airborne Division in Fort Bragg, N.C., this month and by extending the combat tours of about 10,400 troops already in Iraq.
One unit, the 2nd Brigade of the 1st Cavalry Division, is being extended for the second time. Its soldiers originally were told they would be going home in November, but in October they got the news that they would remain until the Jan. 30 elections. Now they are being extended until March.