Pablo Picasso from the Catalan independence movement during his youth despite expressing general support and being friendly with activists within it. He did not join the armed forces for any side or country during World War I, the Spanish Civil War, and World War II. As a Spanish citizen living in France, Picasso was under no compulsion to fight against the invading Germans in either world war. However, in 1940, he did apply for French citizenship, but it was refused on the grounds of his "extremist ideas evolving towards communism". This information was not revealed until 2003. At the start of the
Pablo Picasso by which time the artist had started to sign his work "Picasso"; before he had signed "Pablo Ruiz y Picasso". Picasso's Blue Period (1901–1904), characterized by sombre paintings rendered in shades of blue and blue-green, only occasionally warmed by other colours, began either in Spain in early 1901, or in Paris in the second half of the year. Many paintings of gaunt mothers with children date from the Blue Period, during which Picasso divided his time between Barcelona and Paris. In his austere use of colour and sometimes doleful subject matter – prostitutes and beggars are frequent subjects – Picasso