The northern part reverted to Denmark as ' (North Slesvig). But the middle and southern part, including Schleswig's only city, Flensburg, remained in what since the unification of Germany had become German hands. In Denmark, the loss of ' caused a political crisis, "" or the Easter Crisis, as it happened during the Easter of 1920. After the Second World War the area remained as German territory and, with Holstein, formed the new state of Schleswig-Holstein as a part of the Federal Republic of Germany (West Germany) in 1948.