Complex sentence: The Pakistan Army's Combatant Headquarter, The GHQ, exerted a mounted pressure on the Pakistan Navy to extend the sphere of its operations into the Bay of Bengal increased with the growth of Indian and Indian-inspired naval activities in and around East Pakistan.
Split into simpler sentences: The Pakistan Army's Combatant Headquarter, The GHQ, mounted pressure on the Pakistan Navy to extend the sphere of its operations into the Bay of Bengal. This increased with the growth of Indian and Indian-inspired naval activities in and around East Pakistan.