being made part of the district of Puigcerdà (département of Sègre).
20th century
Andorra declared war on Imperial Germany during World War I, but did not actually take part in the fighting. It remained in an official state of belligerency until 1957 as it was not included in the Treaty of Versailles.
In 1933, France occupied Andorra as a result of social unrest before elections. On July 12, 1934, adventurer Boris Skossyreff issued a proclamation in Urgell, declaring himself "Boris I, King of Andorra", simultaneously declaring war on the Bishop of Urgell. He was arrested by Spanish authorities on July 20 and ultimately expelled from Spain. From 1936 to 1940, a French detachment was garrisoned in Andorra to prevent influences of the Spanish Civil War and Francoist Spain. Francoist troops reached the Andorran border in the later stages of the war. During World War II, Andorra remained neutral and was an important smuggling route between Vichy France and Spain.
Given its relative isolation, Andorra has existed outside the mainstream of European history, with few ties to countries other than France and Spain. In recent times, however, its thriving tourist industry along with developments in transport and communications have removed the country from its isolation. Its political system was modernised in 1993, when it became a member of the United Nations and the Council of Europe
