India retaliates following Pakistan's Operation Grand Slam which results in the Indo-Pakistani War of 1965 that ends in a stalemate followed by the signing of the Tashkent Declaration.

Operation Grand Slam was a key military operation of the Indo-Pakistani War of 1965. It refers to a plan drawn up by the Pakistan Army in May 1965, that consisted of an attack on the vital Akhnoor Bridge in Jammu and Kashmir, India. The bridge was not only the lifeline of an entire infantry division of the Indian Army, but could also be used to threaten the city of Jammu, an important logistical point for Indian forces. The operation saw initial success, but was aborted when the Indian Army opened a new front in the Pakistani province of Punjab in order to relieve pressure in Kashmir. This forced Pakistan to abandon Grand Slam and fight in Punjab, so that the operation ended in failure and stated objectives were not achieved.