In retrospect McKiernan’s troop requests ultimately added up to roughly 30,000 more troops, a combination of combat units and support troops.
Throughout most of 2008, the Bush administration tried to get NATO countries to fill that gap, though they had to have known that would be a challenge. By the late summer, 2008 Bush administration officials realized NATO wasn’t going to come through.
In September 2008 that led the Pentagon to order 2,000 Marines to replace Marines sent to Afghanistan in January as a one-time deployment. At the same time, it also ordered in the first of the additional four combat brigades that McKiernan had requested. This unit of 3,700 soldiers would arrive in January, 2009 and had been originally scheduled to deploy to Iraq.
In December 2008, President Bush sent 2,800 troops to Afghanistan from an aviation brigade that McKiernan had also requested.
So as McKiernan’s outstanding requests for more forces accumulated throughout 2008 to roughly 30,000 soldiers, President Bush sent at least 6,800 troops – months and months after the requests had come in.
By March, President Obama had ordered 21,000 more troops to Afghanistan – which can be seen as roughly the outstanding balance of McKiernan’s original request.