Operation AlbionIn October 1917, an invasion force of some 25,000 German soldiers, accompanied by a flotilla of 10 dreadnoughts, 350 other vessels, a half dozen zeppelins, and 80 aircraft, attacked the Baltic islands of Dago, Osel, and Moon at the head of the Gulf of Riga. It proved to be the most successful amphibious operation of World War I. The three islands fell, the Gulf was opened to German warships and was now a threat to Russian naval bases in the Gulf of