The only son and heir of Maharaja SriSirUmed Singhji II, Bhim Singhji II succeeded his father following his death in 1940. He immediately entered into service with the British Indian Army as an officer, serving during the Second World War and being promoted to Major by 1948. Although he planned several education and modernisation programs for Kotah, they did not reach fruition before Indian independence. He was knighted with the KCSI in 1947, and signed the Instrument of Accession to the Dominion of India on 15 August. The following year, on 25 March 1948, Sir Bhim Singhji merged Kotah into the Rajasthan Union of states and became its first Rajpramukh, but was demoted to Uprajpramukh when the Maharana of Udaipur, who was of a higher rank than Sir Bhim Singhji, acceded to the Rajasthan Union. Sir Bhim Singhji continued in the office of Uprajpramukh until it, along with the office of Rajpramukh, was abolished by the Government of India on 31 October 1956.
Later Work
In 1956, Sir Bhim Singhji served as an Alternate Delegate to the United Nations General Assembly that year. Conversely, since 1959 he had been President of the Rajasthan Board for the Preservation of Wildlife.
On 30 April 1930, Bhim Singhji II married Rathorji Maharani Shivkumari Sahiba, a younger daughter of General Maharaja Sir Ganga Singh of Bikaner. The couple had one son and two daughters:
Maharajkumari Indira Kumari Sahiba, who in 1960 married Raja Rawat Sri Bikramaditya Singh Sahib Bahadur, the Raja of Rajgarh, becoming the Rani Sahiba of Rajgarh.
Maharajkumari Bhuvaneshwari Kumari Sahiba, who married in the 1970s Thakur Sri Devi Singh of Malasar, and had twin daughters Shaivya Rathore and Divya Rathore.
Later years and death
As part of the mass derecognisation of Indian rulers in 1971 under the Indira Gandhi regime, Sir Bhim Singhji was stripped of ruling powers and titles. He died two decades later on 20 July 1991, aged 81, after a reign of 51 years, and was succeeded by his only son, Brijraj Singh.
Titles
1909–1940: Maharajkumar Sri Bhim Singh Sahib Bahadur
1940–1943: His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah
1943–1944: Captain His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah
1944–1945: Major His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah
1945–1946: Lieutenant-Colonel His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah
1946–1947: Colonel His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah
1947–1948: Colonel His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Sir Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah, KCSI
1948–1991: Brigadier His Highness Maharajadhiraj Maharaja Mahimahendra Maharao Raja Sri Sir Bhim Singh II Sahib Bahadur, Maharao Raja of Kotah, KCSI