Sirimavo Bandaranaike, the widow of Bandaranaike, took office as prime minister in 1960, and withstood an attempted coup d'état in 1962. During her second term as prime minister, the government instituted socialist economic policies, strengthening ties with the Soviet Union and China, while promoting a policy of non-alignment. In 1971, Ceylon experienced a Marxist insurrection, which was quickly suppressed. In 1972, the country became a republic named Sri Lanka, repudiating its dominion status. Prolonged minority grievances and the use of communal emotionalism as an election campaign weapon by both Sinhalese and Tamil leaders abetted a fledgling Tamil militancy in the north during the 1970s. The policy of standardisation by the Sirimavo government to rectify disparities created in university enrolment, which was in essence an affirmative action to assist geographically disadvantaged students to obtain tertiary education, resulted in reducing the proportion of Tamil students at university level and acted as the immediate catalyst for the rise of militancy. The assassination of Jaffna Mayor Alfred Duraiyappah in 1975 by the Liberation Tigers of Tamil Eelam (LTTE) marked a crisis point.