The government of J. R. Jayawardene swept to power in 1977, defeating the largely unpopular United Front government. Jayawardene introduced a new constitution, together with a free-market economy and a powerful executive presidency modelled after that of France. It made Sri Lanka the first South Asian country to liberalise its economy. Beginning in 1983, ethnic tensions were manifested in an on-and-off insurgency against the government by the LTTE. An LTTE attack on 13 soldiers resulted in the anti-Tamil race riots in July 1983, allegedly backed by Sinhalese hard-line ministers, which resulted in more than 150,000 Tamil civilians fleeing the island, seeking asylum in other countries.