By August 1921 a total of 14 IPCs had been established. The Profintern's International Propaganda Committees proved ineffectual in changing the opinions of union memberships. Unions began to expel their radical dissidents and international unions began to expel those national sections which participated in the activities of the Profintern, exemplified by the October 1921 expulsion of the Dutch Transport Workers' Federation from its international trade organization. The 2nd World Congress of RILU was held in Moscow in November 1922, in conjunction with the 4th World Congress of the Comintern. As might be expected, the 1922 RILU Congress spent much of its time shaping the application of the Comintern's recently adopted united front policy to the trade union movement. With the prospects for imminent world revolution on the wane, RILU head Solomon Lozovsky proposed an international conference bringing together leaderships of RILU, the Amsterdam International, and various unaffiliated unions — a gathering which was to echo the April 1922 meeting between the Second International, the Two-and-a-Half International, and the Comintern in Berlin "to work out parallel forms and methods of struggle against the offensive of capitalism." In retrospect, 1922 marked the high-water mark for the Profintern's size and influence in Europe, with a sizable new contingent joining the organization's ranks in France when the Confédération Genérale du Travail (CGT) attempted to discipline and expel its syndicalist members but ended up causing a full scale organizational split in which the majority of French trade unionists affiliated with a new "Red" union. Additional headway was made in Czechoslovakia, where a majority of trade union members similarly affiliated with RILU, following a campaign of expulsions of Communist individuals and unions by the Social Democratic leadership. In October 1922 the Czech Red unions held a congress of their own, formalizing the split with the Social Democratic unions. It is worthy of mention that the Communist Party of Czechoslovakia was an extremely large organization in this period, claiming 170,000 members in 1922, dwarfing all but a few Communist parties around the world. In Bulgaria the All-Bulgarian Federation of unions chose to affiliate with the Profintern outright, but even that movement was split when opponents established a rival organization called the Free Federation of Trade Unions. Spain, too, saw its national labor movement formally divided. The climate was acrimonious as bitter charges and counter-charges levying responsibility for the shattering the trade union movement flew in all directions.