After the October Revolution, the OHL negotiated the Treaty of Brest-Litovsk to free troops for the 1918 Spring Offensive on the Western Front. As the tide of the war turned against Germany with the Allied Hundred Days Offensive, in late September 1918, Ludendorff called for the "parliamentisation" of the German government and immediate armistice negotiations. When he reversed course and demanded the fight to be resumed in October, Ludendorff was sacked and replaced by Lieutenant-General Wilhelm Groener.