What is the 126-year-old Cauvery water sharing dispute?
The 126-year-old Cauvery dispute began in 1892 when the Madras Presidency and the princely state of Mysore couldn't agree on how to divide water. An agreement was signed in 1924, wherein Tamil Nadu and Puducherry were assigned 75% water, while Karnataka was given 23%. After Independence, Tamil Nadu supported the 1924 formula, while Karnataka argued water should be proportionally divided.