crack down on the growing activity of Tamil militant groups active since the mid-1970s. He passed the Prevention of Terrorism Act in 1979, giving police sweeping powers to arrest and detain. This only escalated the ethnic tensions. Jayewardene claimed he needed overwhelming power to deal with the militants. After the 1977 riots, the government made one concession to the Tamils; it lifted the policy of standardization for university admission that had driven many Tamil youths into militancy. The concession was regarded by the militants as too little and too late, and violent attacks continued, culminating in the ambush of Four Four Bravo which led to the Black July riots. Black July riots transformed the militancy into a civil war, with the swelling of ranks of the militant groups. By 1987, the LTTE had emerged as the dominant of the Tamil militant groups and had a free hand over the Jaffna Peninsula, limiting government activities in that region. Jayewardene's administration responded with a massive military operation codenamed Operation Liberation to eliminate the LTTE leadership. Jayewardene had to halt the offensive after pressure from India pushed for a negotiated solution to the conflict after executing Operation Poomalai. Jayewardene and Indian Prime Minister Rajiv Gandhi finally concluded the Indo-Sri Lanka Accord, which provided for devolution of powers to Tamil dominated regions, an Indian peacekeeping force in the north, and the demobilization of the LTTE. The LTTE rejected the accord, as it fell short of even an autonomous state. The provincial councils suggested by India did not have powers to control revenue, policing, or government-sponsored Sinhala settlements in Tamil provinces. Sinhala nationalists were outraged by both the devolution and the presence of foreign troops on Sri Lankan soil. An attempt was made on Jayewardene's life in 1987 as a result of his signing of the accord. Young, deprived Sinhalese soon rose in a revolt, organized by the Janatha Vimukthi Peramuna (JVP) which was eventually put down by the government by 1989. Foreign Policy In contrast with his predecessor, Sirimavo Bandaranaike, Jayewardena's foreign policy was aligned with American policies (earning him the nickname 'Yankie Dickie') much to the chagrin of India. Before Jayewardena's ascendency into the presidency, Sri Lanka had doors widely open to neighboring India. Jayewardena's tenure in the office restricted the doors to India a number of times; once an American company tender was granted over an Indian company tender. Post-presidency Jayewardene retired