Kallar, Maravar, Agamudaiyar basically are the Pandiyan caste who formed the Pandiyan Army.
Kallar involved in robbery and initiated the war accoring to ancient tamil war protocol of stealing cows and agro products. They lived and are still populas on the northern pandian territory or Thanjavur, Thiruchirappalli, Dindugal, Madurai districts.
Agamudaiyar formed the police force and did security jobs. They bascially stood guard for Temple, Farm lands, Nadan hamlets. They are called servai in Thirunalveli, Thoothukudi districts. Maruthu Sagothararkal are marked for their guard of Kalayar koil against the war with british. They are scaterd all thro Pandiyan Territory mainly to all temple cities.
Maravar are brave warriors who met head-on. They lived and are still populas on the northern Pandian Territory next to Kallar belt in the districts of Ramnad, Madurai, Raja Palayam, Thirunelveli. They shared the rulling titles of Pandiyans for their bravery. Raja of Ramnad is the fact for this