USA HISTORY

Detailed explanation-1: -The United Nations commander General MacArthur ordered an amphibious landing at Inchon, a port halfway up the Korea peninsula. His forces were able to drive the KPA back into the North and up to the Yalu River, the border between China and North Korea.

Detailed explanation-2: -The war reached international proportions in June 1950 when North Korea, supplied and advised by the Soviet Union, invaded the South. The United Nations, with the United States as the principal participant, joined the war on the side of the South Koreans, and the People’s Republic of China came to North Korea’s aid.

Detailed explanation-3: -MacArthur and UN forces crossed the 38th parallel and moved quickly through North Korea to the Yalu River.

Detailed explanation-4: -The 38th parallel of latitude was chosen in 1945 by the USA and USSR as a convenient borderline for their divided military occupation of the Korean peninsula.