Shah Jahan, drew the attention of administration towards the magnificent palaces of the fort. There were many attempts to eliminate Delhi. Nadir Shah had ordered his soldiers to plunder and annihilate Delhi. Abdali and Taimur Lane, too, tried to demolish Delhi. But the city resisted these attempts bravely and remained unshaken.

The history of Delhi encompasses the role played by the city during India’s fight for independence. When India’s first war of independence took place in the year 1857 AD, Delhi came to the forefront. Delhi was made the capital of India in the year 1911 by the British, which shifted all activities during the freedom struggle towards Delhi. During this period, the Azad Hind Fauz tried to capture Delhi and establish Swaraj. The popular slogan Dilli Chalo, which evolved during the freedom struggle, is still used by leaders and political parties in rallies and demonstrations.
Source: http://www.lonelyplanet.com/india/delhi,
http://www.indianholiday.com/new-delhi/history-of-delhi.html