Prior to 1971, Pakistan's military had a strong presence in East Pakistan and an active theatre-level military command. After Bangladesh's independence from Pakistan, full diplomatic relations were not restored until 1976. Relations improved considerably under the Bangladesh military governments of President Major Ziaur Rahman and General Hossain Mohammad Ershad, as Bangladesh had grown distant from its former war ally, India. Common concerns over India's regional power have influenced strategic co-operation, leading to a gift of several squadrons of F-6 fighter aircraft to the Bangladesh Air Force in the late 1980s.