The white-blue flag with the red sun was a flag used by Seperatist - Mizo National Front from 1961 until 1986
Sikhs demanded an independent Sikh country to be called Khalistan. largely instigated by a few sikh leaders who believed sikhs too should get a new state after splitting of India and Pakistan based more upon religious lines.
The best way to counter this seperatist ambitions seems to be to recognize their culture, religion and language and not try to homogenize people with a single language or religion . It must also be pointed out that there must also be all round development throughout India and not only the states who have more population or Legislators.
Flag of Meghalaya
States which have choosen to Integrate with the Indian Union:
Flag of Sikkim
Flag of Orissa
In 1803, the British under the British East India Company occupied Orissa after the Second Anglo-Maratha War. In 1950, Orissa became a constituent state in the Union of India.
Flag of the Maratha's (Maharashtra)
Flag of Nizam of Hyderabad
Flag of Uttar Pradesh
Uttar Pradesh is central to Indian culture and politics and was especially important in modern Indian history
Flag of Haryana
On 1 November 1966, Haryana was carved out of the mostly Hindi-speaking eastern portion of Punjab, while the mostly Punjabi-speaking western portion remained as current day Punjab.
Flag of Himachal Pradesh
On 18 December 1970 the State of Himachal Pradesh Act was passed by Parliament and the new state came into being on 25 January 1971
Flag of Rajasthan
After Indian independence and the partition of India in 1947, the new Indian government grouped the former princely states of Gujarat into three larger unit Saurashtra, Kathiawar peninsula & Kutch.