Pakistan Rarely Part of India

At the close of Samudragupta’s triumphal career (4th century AD) his empire --- the greatest in India since the days of Asoka --- extended on the north to the base of the mountains, but did not include Kashmir…. Samudragupta did not attempt to carry his arms across the Sutlej or to dispute the authority of the Kushan Kings who continued to rule in and beyond the Indus basin." (Oxford History of India, By VA Smith).

"Harsha’s subjugation of upper India, excluding the punjab, but including Bihar and at least the greater part of Bengal, was completed in 612 AD." (Ibid)

"The Gurjara empire of Bhoja may be defined as, on the north, the foot of the mountains; on the northwest, the Sutlej; on the west the Hakra or the ‘lost-river’ forming the boundary of Sind." (Ibid).

"The rule of the Pratiharas had never extended across the Sutlej, and the history of the Punjab between the 7th and 10th centuries AD is extremely obscure. At some time, not recorded, a powerful kingdom had been formed, which extended from the mountains beyond the Indus, eastwards as far as the Hakra of lost-river, so that it comprised a large part of the Punjab, as well as probably northern Sind." (Ibid)

"Politically during the time when Hellenism in the south Asian sub-continent was decaying and the centuries afterward, the north-west remained separate from northern and central India. The Gupta empire, which at its height in the middle of the 4th century AD, and the empire of Harsha in the middle of the 7th century AD barely reached into the Punjab and included none of Sind." (Pakistan and Western Asia, by Norman Brown)