Erich Ludendorff

Erich Friedrich Wilhelm Ludendorff (sometimes given as von Ludendorff) (April 9, 1865 – December 20, 1937) was a German Army officer, "Generalquartiermeister" during World War I, victor of Liège, and, with Paul von Hindenburg, one of the victors of the battle of Tannenberg. 
After the war, he briefly supported Adolf Hitler and the Nazi Party. He was not found guilty for his role in the Nazis' unsuccessful Beer Hall Putsch. He became disillusioned with politics and retired from public life that year.