Final answer:
The division of Korea by the United States and the Soviet Union after World War II led to the formation of two Koreas - North Korea (Democratic People's Republic of Korea) and South Korea (Republic of Korea), with respective communist and capitalist governments.
Step-by-step explanation:
The formation of two Koreas was originally led by the division of Korea by the United States and the Soviet Union after World War II. The Soviet Union administered the northern portion, establishing a communist government under Kim Il Sung, while the United States administered the southern region, establishing a capitalist government under Syngman Rhee. The ideological differences between these two regions and the geopolitical interests of the US and the Soviet Union ultimately led to the formal separation of North Korea (Democratic People's Republic of Korea) and South Korea (Republic of Korea).