With the outbreak of the war two days earlier, the US forces were attempting to evacuate US civilians and diplomats from the city of Seoul, where a battle was ongoing between North and South Korean forces. Transport aircraft and ships, escorted by US fighter planes, were attempting to bring civilians out of the country as fast as possible. During these missions on June 27, US forces were attacked by North Korean aircraft in two separate incidents in the Seoul area. Despite being outnumbered, the better-built American aircraft outmaneuvered the North Koreans, quickly shooting down half of the attacking force.