Sri Lankan Tamils issue dominated TN polity in 2013

Failure by political parties and organisations to force the UPA government to boycott CHOGM on Sri Lankan Tamils issue, acquittal of two Kanchi seers in a murder case, gazetting of Cauvery Tribunal award and end of decade-long alliance between DMK and Congress topped the list of major events in Tamil Nadu during 2013.
It turned out to be a celebratory occasion for the AIADMK government when its Chief Minister J Jayalalithaa snapped up a major victory on the vexed Cauvery water sharing issue when the Centre notified the tribunal order in the Gazette in February, giving the water adjudication award a legal sanctity and paving way for its implementation.

The caste clashes at Marakkanam, murder of Sangh Parivar leaders including BJP General Secretary 'Auditor' V Ramesh and the successful hunt by police of three terror suspects were other highlights of the year.
Despite snapping its long political alliance with Congress, DMK patriarch M Karunandihi brought to fore his political acumen and managed to get his former ally to vote for his daughter Kanimozhi, one of the accused in the 2G spectrum scam, to ensure her a second term in Rajya Sabha.
The successful launch of Mars Orbitor Mission by ISRO erased the strains of disappointment that had struck the scientists following failure of GSLV 5 during the year. The mission catapulted India into a club of select nations engaged in study of the red planet.

The political fissures that broke out between DMK and Congress after the 2G scam reached the door steps of Karunanidhi's daughter, escalated and culminated in calling off its alliance during March.
The year also witnessed the emergence of a new world chess champion when Norway's Magnus Carlsen dethroned five time champion Vishwanathan Anand from India in November.