DAMS
https://en.wikipedia.org/wiki/List_of_dams_and_reservoirs_in_India
SLAVERY
https://en.wikipedia.org/wiki/Slavery_in_India
burma tamils
https://en.wikipedia.org/wiki/Myanmar_Tamils#:~:text=After%20he%20seized%20power%20through,and%20oppression%20by%20the%20junta.
The Burma Bazaar in Tamil Nadu was set up in 1969 by Myanmar Tamil refugees.
Between 1826 and 1929, three major waves of Chettiar migration transformed Burma’s financial landscape.in 1942, the Japanese invasion of Burma forced nearly 500,000 Indians to flee—many on foot, through treacherous jungle routes to northeast India.
manipur tamils-Moreh, a small border town in Manipur
https://currentaffairs.adda247.com/the-forgotten-story-of-tamils-in-moreh-how-a-manipur-border-town-became-home-to-tamil-diaspora/
first woman engineer
https://en.wikipedia.org/wiki/Ayyalasomayajula_Lalitha
others
https://shanthamohan.com/roots-and-wings-inspiring-stories-of-indian-women-in-engineering/