Background
In January 1919, a Boris Skossyreff - aged 22 and a former translator for the Japanese Military Mission - appeared in Westminster Police Court in London charged with passing fraudulent cheques: the money was eventually paid, by the same person according to The Times.
In December 1933, Skossyreff obtained Andorran citizenship and after some time he presented a plan for administrative reform involving the creation of several offices to which he asked to be appointed himself. He quickly got into trouble, however, and was expelled around May 1934.
On July 12 of the same year, he issued a proclamation in Urgell, Spain, declaring himself Boris I, King of Andorra and "regent for His Majesty the King of France" (though the family heads of the House of Bourbon disavowed him), and declaring war on the Bishop of Urgell, Justí Guitart i Vilardebó, (the co-prince of Andorra). On July 20, he was arrested by Spanish Guardia Civil and taken out of Andorra, first to Barcelona and then on July 23 to Madrid where he was imprisoned until being expelled in November.
Spanish authorities who held him in custody noted he carried a Dutch passport which indicated his date of birth as June 12, 1896. He declared himself to be a White Russian émigré, born in Vilnius (in 1896 part of Tsarist Russia but present day capital of Lithuania).
This account was somewhat conflicted by the publication "Spain Week by Week", which reported on 25 July 1934 that he was a 38 year old Jew who had been resident "for some years" in Catalonia and Majorca. The account claimed that Skossyreff made his proclamation on July 11, not the day after, and had declared himself "Boris I, Prince of the Valleys of Andorra, Count of Orange and Baron of Skossyreff…sovereign of Andorra and defender of the faith". After pledging his allegiance to the King of France - a purely theoretical allegiance, since France had had no king since 1848 - it reports that he deposed the Consell General de Batlles d'Andorra (Catalan for General Council of Mayors of Andorra), appointed a provisional government, promulgated a constitution and issued a Court Circular before being arrested by the Spaniards.
According to some sources,he died in 1944 while imprisoned in a camp near Perpignan by the Vichy French regime duringWorld War II. However, he survived, and became a ‘special officer’ (Sonderführer, a civilian technician working with the army) on the Eastern Front.