Complex sentence: The Sindh Regiment is an infantry regiment of the Pakistan Army that was established on 1 July 1980, prior to this date there had been no regiment in the Pakistan Army specifically intended to recruit primarily from the Sindhi population.
Split into simpler sentences: The Sindh Regiment is an infantry regiment of the Pakistan Army that was established on 1 July 1980. Prior to this date there had been no regiment in the Pakistan Army specifically intended to recruit primarily from the Sindhi population.