1947–1958 

General Ayub Khan arriving to take command of the Pakistan Army in 1951

The Pakistan Army was created on 30 June 1947 with the division of the British Indian Army. The soon to be created Dominion of Pakistan received six armoured, eight artillery and eight infantry regiments compared to the 12 armoured, forty artillery and twenty one infantry regiments that went to India. Fearing that India would take over the state of Kashmir, irregulars, scouts and tribal groups entered the Muslim majority state of Kashmir to oppose the Maharaja of Kashmir and Kashmiri Hindus and Sikhs in 1947, even though the Maharaja chose to join the Union of India. This led to the Indo-Pakistani War of 1947. Regular army units joined the invasion later on but were stopped after the refusal of the army chief of staff, British officer General Sir Frank Messervy, to obey Pakistani leader Jinnah's orders to move the army into Kashmir. A ceasefire followed on UN intervention with Pakistan occupying the northwestern part of Kashmir and India occupying the rest. Later, during the 1950s, the Pakistan Army received large amounts of economic and military aid from the United States and Great Britain after signing two mutual defence treaties, the Baghdad Pact, which led to the formation of the Central Treaty Organization, and the South East Asian Treaty Organization (SEATO) in 1954. This aid greatly expanded the Army from its modest beginnings.

The sole division headquarters that went to Pakistan was the 7th. 8th and 9th Divisions were raised in 1947; 10, 12th and 14 Divisions were raised in 1948. 15 Div was raised in 1950. At some point before 1954, 6 Division was raised and 9 Division disbanded. 6 Division was disbanded at some point after 1954 as US assistance was available only for one armoured and six infantry divisions.