Ministry of Defense (MoD) over plans regarding the modernisation of the navy that resulted in bitter interservice rivalry between army and navy and ended with Admiral Choudri's resignation to the Presidency in 1959. Proposal of attaining the aircraft carrier was deferred due to financial constraints, forcing Pakistan to move towards establishing the formidable submarine command. From 1956 to 1963, two destroyers, eight coastal minesweepers, and an oiler were procured from the United States and United Kingdom as a direct result of Pakistan's participation in the anti-Communist defence pacts SEATO and CENTO. War with India and subsequent war deployments (1965–1970) After the bitter resignation of Vice-Admiral HMS Choudri in 1959, Vice-Admiral Afzal Rahman Khan was appointed as the Commander in Chief in Navy who worked towards building relations with President Ayub Khan in retaining hopes for procuring a submarine despite financial constraints. The Royal Navy accepted the long awaiting requests from the Pakistan Navy for a regular visit to Karachi Naval Dockyard to provide first hand experience in submarine operations in 1960–61. The Ayub administration did not increase the financial funding of the navy at the expense to army and air force but he did not object to American contributions to train the Pakistan Navy in submarine operations. It was the U.S. Navy that provided an insightful and crucial training support to Pakistan Navy enabling it to conduct operations in long range in the Indian Ocean and the proposal of procuring the submarine was met with favourable views in 1963 due to the prospect of the Soviet Navy leasing a submarine to the Indian Navy. After seeing the U.S. contribution, the United Kingdom decided to provide training and education to Pakistan Navy on submarine operations, and in 1964, was commissioned from the United States under the Security Assistance Program (SAP). Even though, neither the Navy nor the Air Force was notified of the Kashmir incursion in 1965, the Navy was well-prepared at the time when the second war broke out between Pakistan and India in 1965. The naval chief Admiral Afzal Rahman Khan ordered all war units of the Pakistan Navy to take up defensive positions off the coast, but did not order any offensive operations in the Bay of Bengal. As the Indian Air Force's repeated sorties and raids disrupted PAF operations, the Navy assumed a more aggressive role in the conflict. On 2 September, the Navy deployed its first