In 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 Finland, and 20,000 Russians were captured. The invasion proved to be the last major operation in the East. Although the invasion had achieved its objectives and placed the Germans in an excellent position for the resumption of warfare in the spring, within three weeks of the operation, the Bolsheviks took power in Russia (November 7, 1917) and Albion faded into obscurity as the war in the East came to a slow end.



In contrast to the trench-war deadlock on the Western Front, combat in Romania and Transylvania in 1916 foreshadowed the lightning warfare of WWII. When Romania joined the Allies and invaded Transylvania without warning, the Germans responded by unleashing a campaign of bold, rapid infantry movements, with cavalry providing cover or pursuing the crushed foe. Hitting where least expected and advancing before the Romanians could react-even bombing their capital from a Zeppelin soon after war was declared-the Germans and Austrians poured over the formidable Transylvanian Alps onto the plains of Walachia, rolling up the Romanian army from west to east, and driving the shattered remnants into Russia. Prelude to Blitzkrieg tells the story of this largely ignored campaign to determine why it did not devolve into the mud and misery of trench warfare, so ubiquitous elsewhere.