Defence Day (Urdu: یوم دفاع‎ ALA-LC: Yaum-i Difāʿ IPA: [jɔːm-e d̪ɪfɑː]) is celebrated in Pakistan as national day to commemorate the sacrifices made by Pakistani soldiers in defending its borders.[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] The Pakistani narrative holds that it was an unprovoked surprise attack by India, which was repulsed by the Pakistan Army despite its smaller size and fewer armaments.[2][4] The narrative has been criticised by Pakistani commentators as representing false history.[2][5]