Indian Castles 1206-1526: The Rise and Fall of the Delhi Sultanate

From the beginning of the 11th century onwards, the constant sate of war amongst the various Indian kingdoms left them open to outside attack, and Muslim Turkic tribesmen began to pour over the north-west border from modern-day Afghanistan. These raiders consolidated their successes and by 1206 a Muslim state, the Sultanate of Delhi, had been founded, which then extended its direct rule or influence over most of the subcontinent.