South Korea's subsequent history is marked by alternating periods of democratic and autocratic rule. Civilian governments are conventionally numbered from the First Republic of Syngman Rhee to the contemporary Sixth Republic. The First Republic, arguably democratic at its inception, became increasingly autocratic until its collapse in 1960. The Second Republic was strongly democratic, but was overthrown in less than a year and replaced by an autocratic military regime. The Third, Fourth, and Fifth Republics were nominally democratic, but are widely regarded as the continuation of military rule. With the Sixth Republic, the country has gradually stabilized into a liberal democracy.