The Norwegian Shipping and Trade Mission (Nortraship) was established in London in April 1940 to administer the Norwegian merchant fleet outside German-controlled areas. Nortraship operated some 1,000 vessels and was the largest shipping company in the world. It made a major contribution to the Allied war effort. The British politician Philip Noel-Baker, Baron Noel-Baker, commented after the war, "The first great defeat for Hitler was the battle of Britain. It was a turning point in history. If we had not had the Norwegian fleet of tankers on our side, we should not have had the aviation spirit to put our Hawker Hurricanes and our Spitfires into the sky. Without the Norwegian merchant fleet, Britain and the allies would have lost the war". Nortraship had its main offices in London and New York City and was active during World War II. Nortraship was vital to Norway and the exile government as it lacked other means to support the Allied fight against the Axis powers. The organisation handed the various vessels back to their owners when Norway was liberated in May 1945. Norwegian merchant fleet prior to World War II In the years after World War I the Norwegian merchant fleet recouped its losses and expanded into new sectors, primarily tankers but also dry cargo vessels. The 1930s, in particular, were a growth period, in contrast to the other major shipping nations. By the end of 1938, some 7% of world tonnage was Norwegian and Norway was the fourth-largest shipping nation, behind the UK, the US and Japan. Moreover, the expansion was based on new building, thus lowering the median age of Norwegian vessels. Most of the new vessels were powered by diesel motors; they accounted for some 62% of the fleet, while Japan had some 27%, and the UK 25%. Around 42% of the fleet was modern tankers, a total of 18% of the world tanker tonnage. Norwegian shipowners were innovative and willing to take risks in ordering new vessels during the depression. The various services needed for operation of ships had also been expanded, the most important being the classification society Det Norske Veritas but also shipbrokers, insurance companies and shipping banks. The government also played an important part in establishing and updating regulations, and in providing schools for engineers and navigators. The forgotten war, 3 September 1939 – 9 April 1940 When Norway was invaded by Germany on 9