Polish community in France, i.e. the Polish Library, Adam Mickiewicz Museum and Polish Historical and Literary Society in Paris are listed by UNESCO's Memory of the World Programme. Interwar period Poland and France were political and military allies during the interwar period. The political agreement signed in Paris on February 19, 1921 established cooperation between them. Starting with the Blue Army that aided France in World War I and the French Military Mission to Poland during the Polish–Soviet War (1919–1921), the Franco-Polish Military Alliance was signed in 1921 and continued until the German invasion of Poland. World War II France declared war on Germany when it invaded Poland in 1939, and then attacked Germany, however, the French soon withdrew in what is known as the Phoney War. During the German invasion, Poland evacuated its gold reserve to France. During the subsequent German occupation of Poland, a new Polish Army formed in France under the command of General Władysław Sikorski in late 1939. Polish units included the 1st Grenadiers Division, among others. France itself fell to Germany following the German invasion of France in 1940, and afterwards, 23,000 Poles were deported by the Germans to slave labour in German-occupied France, and French prisoners of war were also deported to German prisoner-of-war camps and forced labour camps in German-occupied Poland. Due to the German occupation of both countries, official Polish–French relations ceased in 1940–44. Some Poles became part of the French Resistance. Polish troops also took part in the liberation of France in 1944. Despite this, France was blamed for betraying its promise to help in Poland, due to the alliance treaty signed between Poland and France prior to World War II; later it was extended after large territories in the East of Poland was annexed by the Soviet Union, which eventually became modern Belarus, Ukraine and Lithuania after the Dissolution of the Soviet Union in 1990–1991. Cold War During the Cold War, Polish–French relations were poor, due to both countries being on the opposite sides of the Cold War. However France was - again - a site of a thriving Polish emigrant community (see Kultura and Jerzy Giedroyc). Other prominent members of the Polish community in France of that period have included Rene Goscinny. Post-1991 Polish-French relations have improved after the fall of communism. Poland, France and Germany are part of the Weimar Triangle which was created in 1991 to strengthen