LyrArc Article Gist
The less known role on July 25, 1947 of  Lord Mountbatten in getting the 550 Indian princely rulers to sign the Act of Accession to India is shown in The Indian Express. The British Empire was built from the British East India Company's acquired territories in India as the Company expanded in northern India and near the ports of Bombay, Madras and Calcutta with trading and using its army to protect regional states and monarchies. This happened from the period of the decline of the Afghanistan/Iran based dynasties in northern India called the Mughals from 1650 to 1756, and 1756 to 1857 with the decline of the Maharashtra based Maratha dynasty in two phases. The Empire left one third of India in the hands of princely rulers after a rebellion in 1857, with the British offering guarantees  of protection to these rulers. 

The forming of and independent India under Gandhi, Patel and Nehru in 1947 led to the need to avoid a balkanized state and regionally disrupted India. It was Patel and V.P. Menon who accomplished the task of cajoling and pushing 550 princely rulers to join India including states as different as Mysore, Jodhpur and Baroda. Viceroy Mountbatten joined in this effort. Mountbatten is shown here on July 25, 1947, of dramatically playing around with around glass paperweight referring to it as a crystal ball that had answers to the queries of princes, and then suggesting with much tenacity- "sign the Act of Accession."