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| 1968, July |
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| Violent rioting followed the revelation that a former minister of the interior had maintained contacts with Fidel Castro. The cabinet was obliged to resign, and the government suspended constitutional rights. | 1 |
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| 1969, April 27 |
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| Death of Pres. Barrientos in a helicopter accident. He was succeeded by V.P. Adolfo Siles Salinas. | 2 |
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| Sept. 26 |
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| Pres. Siles was overthrown by a military coup and was followed by Pres. Alfredo Ovando Candia, commander in chief of the armed forces, who introduced a more liberal policy: political prisoners were released, troops were withdrawn from the mines, and restrictions on trade unions were rescinded. | 3 |
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| Oct. 17 |
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| The government nationalized the U.S.-owned Bolivian Oil Company. | 4 |
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