Complex sentence: The then president of Pakistan Field Marshal Ayub Khan laid the foundation stone of "Momenshahi Cadet College" at the Mirzapur Upazila in the then Mymensingh District (now Tangail district) of Bangladesh on 29 November 1963.
Split into simpler sentences: The then president of Pakistan Field Marshal Ayub Khan took initiatives to establish the cadet college. He laid the foundation stone of "Momenshahi Cadet College" at the Mirzapur Upazila in the then Mymensingh District (now Tangail district) of Bangladesh on 29 November 1963.