Argonne and Meuse Offensive- http://militaryhistory.about.com/od/worldwari/p/meuseargonne.htm
Battle of Tannenberg- http://www.firstworldwar.com/battles/tannenberg.htm
Battle of Verdun- http://www.firstworldwar.com/battles/verdun.htm
Battle of Tannenberg- http://www.firstworldwar.com/battles/tannenberg.htm
Battle of Verdun- http://www.firstworldwar.com/battles/verdun.htm