The Transfăgărășan was constructed between 1970 and 1974 during the rule of Nicolae Ceaușescu as a response to the 1968 invasion of Czechoslovakia by the Soviet Union. Ceaușescu wanted to ensure quick military access across the mountains in case of a Soviet invasion. At the time, Romania already had several strategic mountain passes through the Southern Carpathians, whether inherited from the pre-communist era (the DN1 and the high-pass DN67C) or built during the initial years of the Communist regime (the DN66). These passes, however, were mainly through river valleys, and would be easy for the Soviets to block and attack. Ceaușescu therefore ordered the construction of a road across the Făgăraș Mountains, which divide northwestern and southern Romania.