Even Jharkhand and Bihar both are Hindi states, geographically near and was same state earlier, there was always cultural, political, geographical and economical differences.
Jaipal Singh Munda, Indian Hockey captain and a member of Constituent Assembly, was the first leader who demanded Jharkhand as a separate state before Independence of India. This demand was rejected by Simon Commission, 1929. After Independence of India, first Prime Minister Nehru rejected this by saying there will be no ‘Faarkhand’ (Divided Land).
In 90s, Shibu Soren led Jharkhand Mukti Morcha made mass movement for Jharkhand. Later BJP supported the formation of Jharkhand along with Chhattisgarhg and Uttarakhand. President K. R Narayanan approved the Bihar reorganization bill in 2000, and Jharkhand came into existence as 28th state of India.
Jharkhand, the 28th state of India was formed on 15 November, 2000 after a long standing tribal movement for statehood. Jharkhand was earlier a part of Bihar, precisely it was the south Bihar, a highly mineral rich area with a substantial tribal population. 15th November is the Birth Anniversary of tribal leader Birsa Munda who became a part of the tribal movement against the British which began in the 1870s in the Chhota Nagpur plateau. Born in 1875, Munda got highly involved in the movement around 1890. He was arrested by the British and died in a Ranchi jail at the young age of 25 in 1900. Birsa Munda is a respected figure in the state and a lot of institutions in Jharkhand including jails, universities and stadiums are named after him.