place of Nivelle, and Foch was recalled and promoted to chief of the general staff. Like Pétain, Foch favoured only limited attacks (he had told Lieutenant General Sir Henry Wilson, another British Army officer, that the planned Flanders offensive was "futile, fantastic & dangerous") until the Americans, who had joined the war in April 1917, were able to send large numbers of troops to France. Outside of the Western Front, Foch opposed British Prime Minister David Lloyd George's plans to send British and French troops to help Italy take Trieste, but was open to the suggestion of sending heavy guns. The Anglo-French leadership agreed in early September to send 100 heavy guns to Italy, 50 of them from the French army on the left of Field Marshal Sir Douglas Haig, C-in-C of the BEF, rather than the 300 which Lloyd George wanted. As the guns reached Italy, Cadorna called off his offensive (21 September). Until the end of 1916, the French under Joffre had been the dominant allied army; after 1917 this was no longer the case, due to the vast number of casualties France's armies had suffered in the now three and a half-year-old struggle with Germany. The Supreme War Council was formally established on 7 November 1917, containing the Prime Minister and a Minister from each of the Western Front powers (i.e., excluding Russia), to meet at least once a month. Foch (along with Wilson and Italian general Cadorna) were appointed military representatives, to whom the general staffs of each country were to submit their plans. The French tried to have Foch as representative to increase their control over the Western Front (by contrast, Cadorna was disgraced after the recent Battle of Caporetto) and Wilson, a personal friend of Foch, was deliberately appointed as a rival to General Robertson, the British Chief of the Imperial General Staff, an ally of Haig's, who had lost 250,000 men at the battle of Ypres the same year. Clemenceau was eventually persuaded to appoint Foch's protégé Weygand instead, although many already suspected that Foch would eventually become the Allied Generalissimo. Late in 1917 Foch would have liked to have seen Haig replaced as C-in-C of the BEF by General Herbert Plumer; however, Haig would remain in command of the BEF for the remainder of the war. 1918 In January 1918, in accordance with Lloyd George's wishes, an executive board was set up