Beginning early next year, U.S. Special Forces are expected to vastly expand their presence in Pakistan, as part of an effort to train and support indigenous counter-insurgency forces and clandestine counterterrorism units, according to defense officials involved with the planning.

These Pakistan-centric operations will mark a shift for the U.S. military and for U.S. Pakistan relations. In the aftermath of Sept. 11, the U.S. used Pakistani bases to stage movements into Afghanistan. Yet once the U.S. deposed the Taliban government and established its main operating base at Bagram, north of Kabul, U.S. forces left Pakistan almost entirely. Since then, Pakistan has restricted U.S. involvement in cross-border military operations as well as paramilitary operations on its soil.