In the 18th century, the entire region came under the control of the Maratha Empire, in particular the Bhonsle maharajas of Nagpur.
Some of the former Maratha territory was ruled directly by the British, and attached to the Bengal Presidency; other territories became princely states, under the control of local rulers under a treaty of subsidiary alliance to the British monarch following the annexation in 1803.
These territories were managed the Political Department and were not subject to any regular Settlement and Revenue system.
[3] The status of the Orissa Tributary States, the largest of which were Mayurbhanj, Keonjhar, Dhenkanal, Baudh, and Nayagarh, was unclear until 1888, when the Secretary of State for India accepted the view that they did not form part of British India, and modified powers were handed over to the Orissa chiefs under the control of a superintendent.
Their aim was to establish a unit that would be large enough to exist as a separate state within the Indian Union.