The abrupt termination of Park 's 18 - year authoritarian rule left a power vacuum and led to political and social instability .
A series of democratic movements in South Korea began with the assassination of President Park Chung - hee on October 26 , 1979 .
The abrupt termination of President 's 18 - year authoritarian rule left a power vacuum and led to political and social instability .
A series of democratic movements in South Korea began with the assassination of President Park Chung - hee on October 26 , 1979 .