During the Thirty Years' War (1618–1648), about eight million Germans were killed by bubonic plague and typhus. The disease also played a major role in the destruction of Napoleon's "Grande Armée" in Russia in 1812. During the retreat from Moscow, more French military personnel died of typhus than were killed by the Russians. Of the 450,000 soldiers who crossed the Neman on 25 June 1812, fewer than 40,000 returned. More military personnel were killed from 1500 to 1914 by typhus than from military action. In early 1813, Napoleon raised a new army of 500,000 to replace his Russian losses. In the campaign of that year, more than 219,000 of Napoleon's soldiers died of typhus. Typhus played a major factor in the Great Famine of Ireland. During World War I, typhus epidemics killed more than 150,000 in Serbia. There were about 25 million infections and 3million deaths from epidemic typhus in Russia from 1918 to 1922. Typhus also killed numerous prisoners in the Nazi concentration camps and Soviet prisoner of war camps during World WarII. More than 3.5 million Soviet POWs died out of the 5.7 million in Nazi custody.