In the 26 April and 10 May 1914 general elections Alexandre Blanc regained his seat on the second ballot. During
World War I (July 1914 - November 1918) Blanc remained with the parliamentary minority that gradually took a more traditional position, leading to the split of the socialist party in 1920. After
Jean Jaurès had been assassinated, he refused to follow the leadership of
Pierre Renaudel and would not join the
Union sacrée. An international socialist
conference at Kienthal in Switzerland was arranged for the end of April 1916, a follow-up to the 1915
Zimmerwald Conference. The
Confédération générale du travail (CGT, General Confederation of Labor) leaders
Alphonse Merrheim,
Albert Bourderon and
Marie Mayoux were expected to represent France, but were refused the passports they needed to travel. Three delegates from the socialist party (SFIO, ''
Section Française de l'Internationale Ouvrière'') led by Alexandre Blanc were able to attend as deputies with parliamentary immunity. The other two, also teachers by profession, were
Pierre Brizon and
Jean Raffin-Dugens. At the conference Blanc managed to offend all the attendees by referring to alleged German atrocities in Belgium, and had to be halted by
Robert Grimm, the president of the conference. A resolution was agreed in which the Workers' International was attacked for failing to oppose the war. On his return, in June 1916 Blanc was one of three French Socialist deputies who voted against providing war credits. The delegates were condemned by the socialist paper ''
L'Humanité'' as "the pilgrims of Kienthal." Even
Jean Longuet, the grandson of
Karl Marx and nominally head of the pacifist section of the socialist party, said he would continue to vote for war credits. At the August 1916 party conference "the dangerous deviationism of Kienthal" was condemned. There was debate over whether the French should send official representatives to the meeting of the
Third Zimmerwald Conference at Stockholm in September 1917. The "three pilgrims" presented a resolution in June 1917 in favor. In the end, the French did not attend. Shortly before the war ended, in October 1918 Blanc wrote that his group would support the majority if, as promised, they led the party back to the International, and fight them if they did not. However, it was not clear if this meant the defunct
Second International or the emerging Moscow-based
Third International. ==Later career==