I have attached a file on Mahmud ghazni
Few figures from the Indian past strike most Hindus with as much revulsion as the Turkish conqueror, Mahmud of Ghazni. Mahmud succeeded his father, a warlord who had carved out an empire in central Asia and had established his capital at Ghazni, south of Kabul, in 998 AD at the age of 27. He launched aggressive expansionist campaigns, and is said to have invaded India no less than 17 times between 1000 and 1025 AD. His campaigns invariably took place during the hot summer season, and on each occasion Mahmud left India before the onset of the monsoons, which would have flooded the rivers of the Punjab and possibly trapped his troops.