It is 60 years ago on 25th June 1950 that the North Korean Communists invaded the South. They very nearly threw the Southern army and it's allies out of Korea untill a USA sea borne landing behind the Northern lines at Pusan along with offensive action from the rest of the troops in the deep Korean south known as the Pusan box made the Northern Communists withdraw eventually all but to the Yalu River (Chinese Border). Troops from 16 nations joined with the South while the Chinese surprised MacArthur's Intel and pushed a quarter of a million troops in to North Korea ending up with almost half a million troops deployed. Launching one of the (supposed) largest surprise attacks in history they destroyed cohesion in the USA and UN 8th Army, creating what famously became Bug Out which was forget your training, forget your comrades, forget all but the most necessary equipment just turn around and move South at maximum speed. It appeared to effect US troops more than others however that was due to the shear number of US formations, and other nations formations joined or were forced to join the Bug Out. A number of formations from several nations including the USA withdrew in good order. Once the Allies gained cohesion again and settled down into prepared positions they again pushed the enemy back over the 38th parallel and trench warfare became the norm for the duration of open warfare which was three years until a cease fire was signed. Their was a large Air Force in use by the Allies while the Russian Communist deployed fighter pilots. Allied Naval force from Aircraft Carriers and Cruisers to Frigates and Patrol Boats all had a go supporting land operations and bombarding enemy areas Note: Many Allied Troops used the infamous Bug Out to get hold of modern USA winter supplies esp Artic Sleeping bags and clothing and heavy support weapons, 30 and 50 cal MG's, heavy Mortars and in the case of a Aussie soldier a quite large US Engineers crane. They were able to do this as I mentioned above the troops who Bugged Out unorganised left behind so much equipment that other Allied troops and many individuals as well as the enemy were quite happy at the amount of supplies and individual equipment left behind for them to pick up at their own leisure.