Page 1Page 2 A map titled Phases of the Korean War. A key notes the area occupied by U N forces, area occupied by Communist forces, Movement of Communist forces, and Movement of U N forces. Map A shows U N forces moving toward North Korea and the Yalu River. Map B shows Communist forces moving to South Korea toward Pusan. The Prewar boundary is marked with a dotted line.

Study these maps, then use the drop-down menus to answer the questions.

Chinese forces joined North Korea and pushed the UN forces back to the 38th parallel.

North Korea invades South Korea and pushes UN forces back to Pusan.

The war reaches a stalemate with neither side advancing too far past the 38th parallel.

General MacArthur drives the North Korean forces back to the Yalu River.