The first committee was formed in Brussels which became the headquarters of the Correspondence Committee, with members including Karl Marx, Wilhelm Wolff, Joseph Weydemeyer, Edgar von Westphalen, Ferdinand Wolff, and Philip Giot.[1]
Another committee was formed in London between May and June 1846, formed by Joseph Maximilian Moll and Karl Schapper, among others. In June 1846, the Wuppertal communist Gustav Adolf Koettgen approached the Brussels committee and suggested that the German communists should inform each other of their actions, which the Committee welcomed.[2]
Engels, who went to France in 1846 upon the committee’s assignment, led the struggle against Pierre-Joseph Proudhon's reformist influence, the “true socialism” of Karl Grün and "Weitlingism," better known as the levelling communism of Wilhelm Weitling, among Paris workers. In August 1846, Engels formed the Paris Committee there, on behalf of the Brussels Committee, to disseminate the ideas of the committees under the League of the Just.[3]
From 1846 to 1847, Heinrich Bürgers and Roland Daniels worked in Cologne for the Correspondence Committee and the physician Georg Weber in Kiel. The traveling salesman and poet Georg Weerth also worked as a courier for the committees.
At the London conference in 1847, at which the Communist League was formed, for which Marx and Engels later wrote the Communist Manifesto, all of the committees were present, for Paris Engels and for Brussels Wolff.[4]