Hyderabad State, also known as Hyderabad Deccan, is an Indian princely state located in the south-central region of India with its capital at the city of Hyderabad.

It is now divided into Telangana state, Hyderabad-Karnataka region of Karnataka and Marathwada region of Maharashtra.

The state is ruled from 1724 until 1948 by a hereditary Nizam who is initially a Mughal governor of the Deccan before becoming independent

Hyderabad gradually becomes the first princely state to come under British paramountcy signing a subsidiary alliance agreement.

After the Indian independence, the state signs a standstill agreement with the new dominion of India, continuing all the previous arrangements except for the stationing of Indian troops in the state.

However, with the rise of militant razakars, India finds it necessary to station Indian troops and invades the state in September 1948 to compel the Nizam.

Subsequently, the Nizam signs an instrument of accession, joining India.