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Prehistoric Madrasian culture Soanian, c. 500,000 BCE Neolithic, c. 7600 – c. 1000 BCE Bhirrana 7570 – 6200 BCE Jhusi 7106 BCE Lahuradewa 7000 BCE Mehrgarh 7000 – 2600 BCE South Indian Neolithic 3000 – 1000 BCE
Ancient Indus Valley Civilization, c. 3300 – c. 1700 BCE Post Indus Valley Period (Cemetery H Culture), c. 1700 – c. 1500 BCE Vedic civilization, c. 1500 – c. 500 BCE Kuru kingdom, c. 1200 – c. 500 BCE Early Vedic period Rise of Śramaṇa movement Later Vedic Period Spread of Jainism – Parshvanatha Spread of Jainism – Mahavira Rise of Buddhism Kingdom of Magadha Brihadratha Dynasty 1700 – 682 BCE Haryanka Dynasty 544 – 413 BCE Shaishunaga Dynasty 413 – 345 BCE Nanda Dynasty, 345 – 322 BCE Mahajanapadas, c. 600 – 345 BCE
Classical Kingdom of Magadha Maurya Dynasty, 322 – 185 BCE Pandya Dynasty, 320 BCE - 280 CE Shunga Dynasty, 185 – 73 BCE Kanva Dynasty, 73 – 28 BCE Sangam period 300 BCE – 400 CE Kushan Dynasty, c. 30 – c. 375 CE Satavahana Dynasty, c. 228 BCE – c. 224 CE Gupta Dynasty, c. 240 – c. 550 CE
Early medieval Pallava dynasty, 275 CE - 897 CE Chalukya Dynasty, 543 – 753 CE Pandya Dynasty, 590 CE - 920 CE Harsha's Dynasty, c. 606 CE – c. 647 CE Karakota Dynasty, c. 724 – c. 760 CE Arab Invasion, c. 738 CE Tripartite Struggle, c. 760 – c. 973 CE Pratihara dynasty Rastrakuta Dynasty Pala Dynasty Chola Dynasty, c. 848 – c. 1251 CE 2nd Chalukya Dynasty, c. 973 – c. 1187 CE
Late medieval Delhi Sultanate, 1206 – 1526 CE Mamluk Dynasty Khalji Dynasty Tugluq Dynasty Sayyid Dynasty Lodhi Dynasty Pandyan Empire, 1251 – 1618 CE Vijayanagara, 1336 – 1646 CE Bengal Sultanate, 1342 – 1576 CE
Early modern Mughal Dynasty, 1526 – 1540 CE Suri Dynasty, 1538/40 – 1556 CE Mughal Dynasty, 1556 – 1857 CE Bengal Subah, c. 1576 – c. 1757 CE Maratha Empire, c. 1674 – c. 1818 CE Company Raj, c. 1757 – c. 1858 CE Kingdom of Mysore, c. 1760 – c. 1799 CE Sikh Empire, c. 1799 – c. 1849 CE
Modern The Great Rebellion, 1857 – 1858 CE British Raj, 1858 – 1947 CE Independence Movement Independent India, 1947 CE – present Dominion of India, 1947 – 1950 CE Republic of India, 1950 CE – present
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The North-Eastern Areas (Reorganisation) Act, 1971 was a major reform of the boundaries of India's North-East region into States and union territories.

Source:^[2]

• Establishment of the states of Manipur and Tripura. They were union territories before.
• Establishment of the state of Meghalaya. It was an autonomous part of Assam before.
• Establishment of the union territories of Mizoram and Arunachal Pradesh.
• Reduction of the area of the state of Assam due to the above changes.
• Allocation of Lok Sabha and Rajya Sabha seats for the newly created territories.
• Allocation of seats to the Legislative Assemblies of the newly created territories.
• While the original 1971 act provided for common High Courts for Assam, Nagaland, Meghalaya, Manipur and Tripura, the 2012 amendment led to creation of separate High Courts for Meghalaya, Manipur and Tripura in March 2013.
• Creation of a new, common High Court for the rest of the modified territories

• Following the Mizoram Peace Accord in 1986, Mizoram was made an Indian state in 1987.^[3]
• Arunachal Pradesh was given full statehood in by the State of Arunachal Pradesh Act, 1986.^[4]

• Administrative divisions of India
• Andhra Pradesh Reorganisation Act, 2014
• Bihar Reorganisation Act, 2000
• Constitution of India
• Jammu and Kashmir Reorganisation Act, 2019
• Madhya Pradesh Reorganisation Act, 2000
• Punjab Reorganisation Act, 1966
• States and union territories of India
• States Reorganisation Act, 1956
• Uttar Pradesh Reorganisation Act, 2000

• Text of the Act