Crerar, resigned to return to his grain business, and was replaced by the more placid Robert Forke, who joined King's cabinet in 1926 as Minister of Immigration and Colonization after becoming a Liberal-Progressive. Socialist reformer J. S. Woodsworth gradually gained influence and power, and King was able to reach an accommodation with him on policy matters. In any event, the Progressive caucus lacked the party discipline that was traditionally enforced by the Liberals and Conservatives. The Progressives had campaigned on a promise that their MP's would represent their constituents first. King used this to his advantage, as he could always count on at least a handful of Progressive MP's to shore up his near-majority position for any crucial vote. Immigration In 1923, King's government passed the Chinese Immigration Act, 1923 banning most forms of Chinese immigration to Canada. Immigration from most countries was controlled or restricted in some way, but only the Chinese were completely prohibited from immigrating. This was after various members of the federal and some provincial governments (especially British Columbia) put pressure on the federal government to discourage Chinese immigration. Also in 1923, the government modified the Immigration Act to allow former subjects of Austria-Hungary to once again enter Canada. Ukrainian immigration resumed after restrictions were put in place during World War I. City planning King had a long-standing concern with city planning and the development of the national capital, since he had been trained in the settlement house movement and envisioned town planning and garden cities as a component of his broader program of social reform. He drew on four broad traditions in early North American planning: social planning, the Parks Movement, the City Scientific, and the City Beautiful. King's greatest impact was as the political champion for the planning and development of Ottawa, Canada's national capital. His plans, much of which were completed in the two decades after his death, were part of a century of federal planning that repositioned Ottawa as a national space in the City Beautiful style. Confederation Square, for example, was initially planned to be a civic plaza to balance the nearby federal presence of Parliament Hill. The Great War monument was not installed until the 1939 royal visit, and King intended that the replanning of the capital would be the World War I memorial. However, the symbolic meaning of the World War I monument gradually expanded to become the place