The first period of independence lasted 22 years, beginning in 1918. Estonia underwent a number of economic, social, and political reforms necessary to come to terms with its new status as a sovereign state. Economically and socially, land reform in 1919 was the most important step. Large estate holdings belonging to the Baltic nobility were redistributed among the peasants and especially among volunteers in the Estonian War of Independence. Estonia's principal markets became Scandinavia, the United Kingdom, and western Europe, with some exports to the United States and to the Soviet Union.