The First International Syndicalist Congress was held in London from September 27 to October 2. It was attended by 38 delegates from 65 organizations in Argentina, Austria, Belgium, Brazil, Cuba, France, Germany, Italy, the Netherlands, Poland, Spain, Sweden, and the United Kingdom. Discussions were contentious and did not lead to the founding of a syndicalist international. Delegates did agree on a declaration of principles describing syndicalism's core tenets. They also decided to launch an International Syndicalist Information Bureau and to hold another congress in Amsterdam. This congress did not take place due to the outbreak of World War I. World War I Syndicalists had long opposed interventionism. Haywood held that "it is better to be a traitor to your country than to your class". French syndicalists viewed the Army as the primary defender of the capitalist order. In 1901, the CGT published a manual for soldiers encouraging desertion. Similarly, in 1911 British syndicalists distributed an "Open Letter to British Soldiers" imploring them not to shoot on striking workers, but to join the working class's struggle against capital. Patriotism, syndicalists argued, was a means of integrating workers into capitalist society by distracting them from their true class interest. In 1908, the CGT's congress invoked the slogan of the First International, proclaiming that the "workers have no fatherland". When World War I broke out in July 1914, socialist parties and trade unions both in neutral and belligerent countries supported their respective nations' war efforts or national defense, despite previous pledges to do the opposite. Socialists agreed to put aside class conflict and vote for war credits. German socialists argued that war was necessary to defend against Russia's barbaric Tsarism, while their French counterparts pointed to the need to defend against Prussian militarism and the German "instinct of domination and of discipline". This collaboration between the socialist movement and the state was known as the in France, the in Germany, and in the Netherlands. Moreover, a number of anarchists led by Peter Kropotkin, including the influential syndicalist Christiaan Cornelissen, issued the Manifesto of the Sixteen, supporting the Allied cause in the war. Most syndicalists, however, remained true to their internationalist and anti-militarist principles by opposing the war and their respective nation's participation in it. The majority of the French CGT and a sizable minority in the Italian USI did not. The CGT had long had a moderate, reformist wing, which gained the upper