The airport began as a wartime aerodrome located in the townland of Collinstown, Fingal. In 1917, during World War I, Collinstown was selected as the base for the British Royal Flying Corps. By April 1918, when the Flying Corps was renamed the Royal Air Force, Collinstown Aerodrome was more than 20% complete. Construction was completed in 1919 when the Irish War of Independence broke out. On 20 March 1919, a group of 30 Irish Volunteers, including five employed by the RAF, stole 75 rifles and 5,000 rounds of ammunition from the base. As Collinstown Camp, the site was used for internment of Irish republicans. At the end of 1922, the land and buildings at Collinstown were transferred to the Irish Free State. The airfield fell into disrepair and grass grew on the former runways. In 1936, the Executive Council of the Irish Free State established a new civil airline — Aer Lingus — which began operating from Casement Aerodrome, at Baldonnel. A decision was made that a civil airport should replace Baldonnel as Dublin's airport. The Collinstown site was chosen and extended into the neighbouring townlands of Rock and Corballis. Work on the new airport began in 1937. By the end of 1939, a grass airfield surface, internal roads, car parks and electrical power and lighting were set up. The inaugural flight from Dublin took place on 19 January 1940 to Liverpool. In August 1938, work began on a new airport terminal building. The terminal building was designed by architect Desmond FitzGerald, brother of politician Garret FitzGerald. FitzGerald, who had designed an airport terminal as part of his college studies, led a team of architects that also included Kevin Barry, Niall Montgomery, Daithí Hanley, Charles Aliaga Kelly, Dermot O'Toole and Harry Robson. The terminal building opened in early 1941, with its design heavily influenced by the tiered structure of the luxury ocean liners of the time. The terminal was awarded the RIAI (Royal Institute of the Architects of Ireland) Triennial Gold Medal in 1942 and is today a listed building. Due to World War II, which was known as The Emergency in Ireland, services were severely restricted at Dublin Airport until late 1945. The only international scheduled routes operated during this time were by Aer Lingus to Liverpool (and for a period to Manchester's Barton Aerodrome). The end of the war meant the beginning of a major expansion in services at the airport. Aer Lingus resumed its London service to Croydon in November 1945. In 1947, KLM started the first European flights to Dublin with a service to Amsterdam. Three new concrete runways were completed in 1948, and in 1950 - after ten years in operation - the airport had welcomed a total of 920,000 passengers. Throughout the 1950s Dublin Airport expanded with virtually uninterrupted traffic growth. Runway extensions and terminal enhancements were carried out to deal with the influx of traffic and passengers. New airlines began serving the airport also. These included British European Airways, Sabena, and BKS. In 1958, a new transatlantic service was started by Aer Lingus via Shannon Airport. By the mid-1950s, it was clear that the original terminal building was too small to cope with growing passenger numbers. A new North Terminal was opened in June 1959. Originally, the plan was that North Terminal would handle all US and European flights, but instead, it became the arrivals terminal for all Dublin Airport passengers, while the original passenger terminal was used for departures. During the 1960s, the number of scheduled carriers continued to grow. By the close of the 1960s, a sizeable number of Boeing 737s, BAC One-Elevens, Boeing 707s and Hawker Siddeley Tridents were using the airport regularly. In the late 1960s new departure gate piers were added close to the old terminal to cope with larger aircraft. These piers would subsequently be connected to Terminal 1. During 1969, the airport handled 1,737,151 passengers.