• October 21, 1921: During talks between the then Governments of Madras and Ceylon in connection with the delimitation of Palk Strait and the Gulf of Mannar, a Ceylonese representative claims that Katchatheevu belongs to Ceylon. But the Raja of Ramnad’s representative insists that the islet was within his zamindari.
  • June 28, 1974: Then Indian Prime Minister Indira Gandhi formally exchanges an agreement with her Sri Lankan counterpart Srimavo Bandaranaike ceding Katchatheevu to Sri Lanka.
  • June 29, 1974: M Karunanidhi, then Tamil Nadu Chief Minister, writes to Prime Minister insisting that Sri Lanka did not at any time exercise any sovereign rights over Katchatheevu. Citing historical records, he says the islet belongs to the Raja of Ramanad since time immemorial.
  • August 15, 1991: In her Independence Day address, Chief Minister Jayalalithaa urges Centre to retrieve Katchatheevu and restore the fishing rights for Tamil fishermen.
  • October 31, 1991: Tamil Nadu Assembly adopts a resolution demanding retrieval of Katchatheevu.
  • 2001: Chief Minister Jayalalithaa meets then Prime Minister A. B. Vajpayee and urged India to obtain the island on lease-in-perpetuity for fishing.
  • 2008: Jayalalithaa, in her capacity as AIADMK general secretary, moves the Supreme Court to declare the Katchatheevu agreements of 1974 and 1976 as null and void.
  • June 8, 2011: Tamil Nadu Assembly adopts fresh resolution for impleading the Department of Revenue in the case filed by Jayalalithaa.
  • May 3, 2013: Yet another resolution demanding retrieval of Katchatheevu adopted by AIADMK Government.
  • May 10, 2013: DMK president M Karunanidhi files a separate petition in Supreme Court seeking to annul Indo-Sri Lankan accord on Katchatheevu.
  • July 2014: Central Government informs Supreme Court that islet is a sovereign property of Sri Lanka. The 1974 and 1976 agreements between India and Sri Lanka do not confer any fishing rights on fishermen from India.
  • January 2015: Central Government seeks to distance itself from the dispute saying the Union Government was administratively concerned with the subject matter.
  • October 27, 2015: Chief Minister Jayalalithaa writes to Prime Minister Narendra Modi urging his intervention to get back Katchatheevu.