During most of the cold war period which two nations were divided into communist and noncommunist parts

The correct answers are Korea and Vietnam. After the Korean War ended in a stalemate in 1953, North Korea remained communist while South Korea stayed a capitalist society.

Vietnam was divided between capitalism and communism from the 1950’s all the the way to the middle of the 1970s. During this nearly two decade period, North Vietnam was communist and South Vietnam was capitalist. Eventually North Vietnam and their communist government took over the southern region of this county.