No, your statement is not correct that half in the military were Bengalis from east Pakistan. There were historical reasons for that. We have to go back to Sepoy Mutiny of 1857 where the Punjabi Sikh, as well as Muslims, fought in favor of the British. I am just stating the fact and not criticizing it. After the war, the British took special care to develop agriculture and industry in the greater Punjab, and in order to get their continuos support a vast number of Punjabis/Pathans were recruited in the British Military.Over half of our army ,navy and airforce were full of Bengalis too.
So, at the point of independece/partition in 1947, both IA and PA had a larger number of Punjabis in the Army. Bengalis were almost non-existence. But, Quaed-e-Azam encouraged the establishment of East Bengal Regiment (EBR). I am not sure, but as far as I know all the regiments like EBR, Punjab or Baluch Regiments or even EPR (BDR/BGB) had a mix of people from other Provinces as well.
So, finally, before 1971 Bengalis constituted about 50,000 out of a total of 300,000 troops in all the regiments together. Airforce and Navy might have a larger Bengali presence but not perhaps over 50%. Please check my statement. I am trying to straighten the facts.
The Chief of Comilla Academy was Akhter Hamid Khan. But I do not know his personal history. Was he from west Pakistan? He contributed a lot, all the people here respected him for his devotion to the development of agriculture.Comilla Model academy for rural development 1959 developed by Pakistan to lift people out of poverty.