He was commissioned in the Indian Army as a 2nd Lieutenant on 21 June 1942 and soon, thereafter, joined the 1st Battalion, 2nd Punjab Regiment in the British Middle East Command. As a young officer, he served in various regimental appointments for the following two years in Egypt, Palestine, Syria and Lebanon. In March 1944, his Battalion the 1st Battalion of 2nd Punjab, as part of the 10th Indian Division sailed for Italy and fought against the Germans in World War II as part of the British 8th Army. Major Aftab Ahmad Khan, then a company commander, returned home in December 1945. His Battalion joined the 1st Indian Parachute Division where he trained as a paratrooper and became Company Commander. In 1947, when the Government of India created the Punjab Boundary Force during independence, in the position of Major served in it till it was disbanded. Having overseen the safe evacuation of hundreds of thousands of Hindus and Sikhs from areas lying between the Sutlej and Ravi rivers to India, and was responsible to safely escort back hundreds of thousands of Muslims stranded in southern eastern Punjab province of India. In January 1948, he was seconded from the Pakistan Army as a Major to Zhob Militia, Quetta, Baluchistan part of the Frontier Corps for 3 ½ years and also commanded Pishin Scouts. During this time, he saw action in the state of Jammu and Kashmir. In 1951, on posting back to the Army, he was posted first as a company commander and then a Brigade Major of an Infantry Brigade in Peshawar. After attending the Command and Staff College, Quetta in 1952, he took command of the 14th Battalion, 1st Punjab Regiment for the next 3 years. In 1956 to 1959, he was posted as General Staff Officer-1 in Murree serving there for 3 ½ years. He received command of the 1st Battalion, 1st Punjab Regiment in Lahore and paraded the Regiment on its 200th raising day. The parade was commanded by Lt. Col. Aftab Ahmad Khan and led by Field MarshalSir Claude Auchinleck former Commander-in-Chief. The 1/1 is the senior most Battalion of the Pakistan Army. Field Marshal M. Ayub Khan at that time the and Commander-in-Chief of the Pakistan Army took the salute at the march past. After having been posted as Colonel Staff of a Division, Colonel Aftab Ahmad Khan was promoted to command a Brigade and fought in defence of Lahore on the Wagah border, extremely successfully in the Indo-Pakistani War of 1965. After various staff appointments in General Headquarters, Rawalpindi, including as Vice Chief of General Staff, Director General Military Training, Research and Development, he commanded a division in Chamb Sector in 1972 followed by taking command of a newly raised X Corps with the rank of Lieutenant General from where he retired after 34 years of service.
Post-military career
After retirement, Lt. Gen. Aftab Ahmad Khan was sent as Ambassador of Pakistan to Libya between 1976 and 1980 and later appointed as Ambassador of Pakistan to the Philippines 1984–1986.
Awards and citations
Family
Lt. General Aftab Ahmad Khan was married to Nasreen Hayat Khan in 1960 and had a daughter Umbereen A. Khan and a son Shahbaz A. Khan. Mrs. Nasreen Aftab Khan died of a protracted illness in 2001. He had an elder brother Professor Namdar Khan, a renowned educationalist, who taught Comparative Education at University of California's School of Education from 1972 to 1976,a younger brother Air Marshall Iftikhar Ahmad Khan, M & Sitara-e-Basalat and two sisters Mrs. Ismat Akhtar and Mrs. Najma Chaudhury.
Death
Lt. General Aftab Ahmad Khan died of a sudden Heart Attack on 12 July 2011 at the age of 88, and was laid to rest with Pakistan Army's traditional Military Honors for retired commanders. He is survived by his daughter Umbereen Fahim Inaam and son Shahbaz Aftab Khan and five grandchildren, Syeda Sharmeen Inaam, Muhammad Adil Shahbaz Khan, Fahd Shahbaz Khan, Aly Shahbaz Khan and Kamila Shahbaz Khan.