evidence: By early August 1950, the North Korean army had overrun most of South Korea except for a small pocket in the far southeast known as the Pusan Perimeter. [...] Dwight D. Eisenhower became president Jan. 20, 1953, and on July 27, 1953, the Korean Armistice Agreement was signed, ending the fighting. Prisoners were exchanged and South Korea gained a bit of territory northeast of the 38th parallel. [...] No peace treaty was ever signed between North and South Korea and in the decades since the Korean War, North Korean forces have conducted numerous cross-border incursions and other acts of aggression.