The reductions were personally demanded by the chief of the Pakistani Army, Gen. Ashfaq Parvez Kayani, said Pakistani and American officials, who requested anonymity while discussing the delicate issue.

The scale of the Pakistani demands emerged as Lt. Gen. Ahmed Shuja Pasha, the head of Pakistan’s chief spy agency, the Inter-Services Intelligence Directorate, or the ISI, arrived in Washington on Monday for nearly four hours of meetings with the C.I.A. director, Leon E. Panetta, and Adm. Mike Mullen, the chairman of the Joint Chiefs of Staff.