The Schlieffen Plan was scuttled when the shaken Moltke ordered the German right wing in France to retire during the First Battle of the Marne. Soon Moltke was replaced by Erich von Falkenhayn who was already the Prussian war minister. After failing to dislodge the Entente in Flanders, he put the Western Front on the defensive. He was replaced at the war ministry in early 1915, and in 1916 Hindenburg and Ludendorff took over as advisers to the supreme commander. They led "OHL" in aggressively intervening in German political and economic life, changing the original goal of defending Germany's borders to conquest and expansion. A consequence of wartime attrition was the premature deployment of "Kriegsakademie" students to army and corps general staffs, some of them before reaching their second year curriculum. Later, standards for General Staff assignment were altered due to the closure of the "Kriegsakademie", to allow examined officers to serve as staff apprentices, raising concerns that these new General Staff Corps officers were not evaluated or trained at the level of those they were replacing.