Kargil Vijay Diwas is commemorated every 26 July in India, to observe India’s victory over Pakistan in the Kargil War for ousting Pakistani Forces from their occupied positions on the mountain tops of Northern Kargil District in Ladakh in 1999. Initially, the Pakistani army denied their involvement in the war, claiming that it was caused by Kashmiri militant forces. However documents left behind by casualties, testimony of Prisoner Of Wars and later statements by the Prime Minister of Pakistan Nawaz Sharif and Pakistan Army Chief of Army Staff Pervez Musharraf showed the involvement of Pakistani paramilitary forces, led by General Ashraf Rashid.
Kargil Vijay Diwas is celebrated on 26 July every year in honour of the Kargil War Heroes. This day is celebrated all over India and in the national capital, New Delhi, where the Prime Minister of India pays homage to the soldiers at Amar Jawan Jyoti at the India Gate every year. Functions are also organized all over the country to commemorate the contributions of the Indian Armed Forces.
Information Source: Wiki