Politique linguistique
In April 1961, Bandaranaike declared a state of emergency in the northern province and ordered the army to clear the Satyagraha organized by the Tamil Federal Party against the Language policy of the government. In response to this incident and Chelvanayakam's claim that "we resorted to direct action to win our freedom" during the satyagraha, Dias proposed the increase of armed forces deployed to the northern and eastern province and called for the formation of military bases in Arippu, Maricchikatti, Pallai, Thalvapadu, Pooneryn, Karainagar, Palaly, Point Pedro, Elephant Pass, Mullaitivu and Trincomalee to counter possible rise of Tamil separatism. He further expanded Operations Monti to create the Task Force Anti Illicit Immigration (TFAII) in 1963 to counter illegal immigration from South India. The TFAII would function from 1963 to 1981 when it was terminated with the on set of the Sri Lankan Civil War.