George decided that it was too late to replace Haig and follow through with the plan. In addition to the establishment of a General Reserve, Prime Minister Clemenceau made an attempt at establishing unity of command. However, Prime Minister Lloyd George refused, citing "home politics" and problems with Parliament and the public. Lloyd George repeated his stand when talking to Field Marshal Haig at GHQ. 13–15 March 1918 The fourth SWC Interallied Conference was held in London. Here, the General Reserve plan was cancelled. It was thought it would take three months to reposition divisions for the Reserve, when, in fact, the German attack was just 8 days away. This caused a great debate between General Ferdinand Foch and Prime Minister Clemenceau, and Prime Minister Lloyd George considered replacing Field Marshal Haig. In the absence of a General Reserve, the allies had to rely on a verbal mutual support agreement between Field Marshal Haig and General Petain. The Council also put out an official statement about the Brest-Litovsk "peace" treaty made between Germany and Russia. Prime Minister Clemenceau made another attempt at establishing unity of command but was rebuffed by Lloyd George, who said Foch's appointment to the Executive War Board had been a "great concession". General Henri Mordacq, Clemenceau's aide, said Britain only turned for unity of command at the last minute when her armies were about to be thrown into the sea. The Allied Reserve eventually slipped from the agenda as the Commanders-in-Chief, Haig and Pétain, refused to hand over sufficient troops. In February 1918, Wilson had replaced Robertson as CIGS and on 26 March Ferdinand Foch became Allied Generalissimo. After April 1918 all Allied troops on the Western Front were placed under the command of the , a multi-national general staff. The was on similar lines to the (French Army Headquarters). Without its two main personalities, Foch and Wilson, the military machinery at Versailles became less important. 1–2 May 1918 The fifth SWC Conference was held in Versailles and Abbeville, France, in the aftermath of the German Operation Michael (21 March) and Operation Georgette (7 April) offensives. The urgent need to transfer American troops to the Western Front, faster than originally planned, was discussed. A separate agreement made in late January between the United States and Britain provided that America would supply six complete divisions to France, transported in British ships, and trained by the British Army.