[1][2] The date of 6 September marks the day in 1965 when Indian troops crossed the international border to launch an attack on Pakistani Punjab in a riposte to Pakistan's Operation Grand Slam targeting Jammu.

[3] While it is officially commemorated as an unprovoked surprise attack by India, repulsed by the Pakistan Army despite its smaller size and fewer armaments,[2][4] the narrative has been criticised by Indian commentators as representing false history.

"[8] According to scholar Shuja Nawaz, the Pakistani military intended to capture the Akhnoor bridge and swing towards Jammu to cut off India's communications with Kashmir Valley.

[8] On 6 September, according to its "pre-declared strategy"[8] of riposte,[10][b] the Indian Army crossed the international border in Punjab, intending to cut off the Grand Trunk Road near Lahore.

However, the statement given by Air Marshal Nur Khan was challenged by the Indian commanders themselves Lt. Gen Harwant Singh himself stated that the heaviest firing by the Pakistan Army was started after the ceasefire.