The Beg family set sailed for Karachi from Mumbai via Pakistan Navy ship in 1949.
His elder brother was already a commissioned officer in the Pakistan Army and encouraged young Beg to follow his path to seek a career in the army.
Beg recalled his memoirs to his Indian interviewer and called Pakistan as "my dream country".
In 1950, Beg was accepted at the Pakistan Military Academy (PMA) in Kakul, graduating from a class of 6th PMA Long Course in 1952.

In 1952, he gained commissioned as 2Lt.
in the 16 Baloch Regiment of Pakistan Army and initially assisting the command of an infantry platoon.
From 1952–1958, he progressed well towards the military ranks, having been promoted to army lieutenant in 1956; and army captain in 1958.
He received recommendations from his field commanding officer for the selection by the special branch to join the special forces, and departed to the United States in 1958 to complete the special forces training with the U.S. Army Special Forces in Fort Bragg, North Carolina.

In 1960, Major Beg returned to Pakistan, and joined the elite Army Special Service Group (SSG), initially commanding a company that specialized in military infiltration.
Major Beg was deployed in Western Pakistan, in areas adjacent to Afghanistan, where his first combat experience took place when he led his company in removing the Nawab of Dir in Chitral in North-West Frontier Province.
In 1965, Major Beg served well in the second war with India and led the Special Forces team against the Indian Army/
The Beg family set sailed for Karachi from Mumbai via Pakistan Navy ship in 1949. His elder brother was already a commissioned officer in the Pakistan Army and encouraged young Beg to follow his path to seek a career in the army. Beg recalled his memoirs to his Indian interviewer and called Pakistan as "my dream country". In 1950, Beg was accepted at the Pakistan Military Academy (PMA) in Kakul, graduating from a class of 6th PMA Long Course in 1952.
In 1952, he gained commissioned as 2Lt. in the 16 Baloch Regiment of Pakistan Army and initially assisting the command of an infantry platoon. From 1952–1958, he progressed well towards the military ranks, having been promoted to army lieutenant in 1956; and army captain in 1958. He received recommendations from his field commanding officer for the selection by the special branch to join the special forces, and departed to the United States in 1958 to complete the special forces training with the U.S. Army Special Forces in Fort Bragg, North Carolina.
In 1960, Major Beg returned to Pakistan, and joined the elite Army Special Service Group (SSG), initially commanding a company that specialized in military infiltration. Major Beg was deployed in Western Pakistan, in areas adjacent to Afghanistan, where his first combat experience took place when he led his company in removing the Nawab of Dir in Chitral in North-West Frontier Province. In 1965, Major Beg served well in the second war with India and led the Special Forces team against the Indian Army/
Mirza Aslam Beg