During this time, the IWW member became synonymous with the hobo riding the rails; migratory farmworkers could scarcely afford any other means of transportation to get to the next jobsite. Railroad boxcars, called "side door coaches" by the hobos, were frequently plastered with silent agitators from the IWW. Building on the success of the AWO, the IWW's Lumber Workers Industrial Union (LWIU) used similar tactics to organize lumberjacks and other timber workers, both in the deep South and the Pacific Northwest of the United States and Canada, between 1917 and 1924. The IWW lumber strike of 1917 led to the eight-hour day and vastly improved working conditions in the Pacific Northwest. Though mid-century historians would give credit to the US Government and "forward thinking lumber magnates" for agreeing to such reforms, an IWW strike forced these concessions. From 1913 through the mid-1930s, the IWW's Marine Transport Workers Industrial Union (MTWIU), proved a force to be reckoned with and competed with AFL unions for ascendance in the industry. Given the union's commitment to international solidarity, its efforts and success in the field come as no surprise. Local 8 of the Marine Transport Workers was led by Ben Fletcher, who organized predominantly African-American longshoremen on the Philadelphia and Baltimore waterfronts, but other leaders included the Swiss immigrant Walter Nef, Jack Walsh, E.F. Doree, and the Spanish sailor Manuel Rey. The IWW also had a presence among waterfront workers in Boston, New York City, New Orleans, Houston, San Diego, Los Angeles, San Francisco, Eureka, Portland, Tacoma, Seattle, Vancouver as well as in ports in the Caribbean, Mexico, South America, Australia, New Zealand, Germany and other nations. IWW members played a role in the 1934 San Francisco general strike and the other organizing efforts by rank-and-filers within the International Longshoremen's Association up and down the West Coast. Wobblies also played a role in the sit-down strikes and other organizing efforts by the United Auto Workers in the 1930s, particularly in Detroit, though they never established a strong union presence there. Where the IWW did win strikes, such as in Lawrence, they often found it hard to hold onto their gains. The IWW of 1912 disdained collective bargaining agreements and preached instead the need for constant struggle against the boss on the shop floor. It proved difficult, however, to maintain that sort of revolutionary enthusiasm against employers. In Lawrence, the IWW lost nearly all of