Dear GRS,
http://www.tamilnation.org/diaspora/tamilnadu/timeline.htm
The Velirs -and later inner Groups as ” Kurunila Mannars” supported the Moovenders and the Thondaimandala Pallavas mostly depending on regional affliations and mtrimonial alliances did play vital role in retaining their support among the Power Centres.
Thus emerged Imperial Chola dynastry in about 850 AD after Vijayalaya was accorded independent King status – moved from Pazhayarai to Thanjai – conquered Mutharayas over there – and controled the belt – hopefully Thanjai – trichy and Thanjai – kudanthai – Thiruvarur – Nagai belt.
His successors expanded towards North and the West. North thondai mandalam. West Chera Kingdom. the expansion towards South lead to Supremacy over Pandya Kingdom. Around Nagerkoil – Kanyakumari and Trivandum ( TILL DATE) the political SENSITIVITY exists !
Nageroil / Suseendram Strong Chola base. KK Pandya. Trivandrum / Vizhignam – Chera. Hardly in a span of about 40 Miles or about 60 Kms. Lanka was closer.
Obviously the one controled the Tip of Southern India – controled the relationship with Lanka.
Supreme Emperor with subordinate Supportive Chieftans lead to expansion of Chola Empire – say about 100 years span in about 970 to 1060 – then Kuylothungas spell – say another 100 years – in about 850 – 1200 AD !
Supportive Chieftans dictating terms to the King – prior to Sundara Chola and post Kulothunga II.
That lead to fall of the dyansty.
Such Supportive Chieftans through their weight behind Sundara Pandya.. but then was a very short spell !!
With Moghul invasion – Traditional Tamil Rule came to end in TN ..without any Supreme Kingdom..
Southern States were revived with entry of Vijayanagara Empire !!
sps