Given the following context:

By 1911, Winnipeg was the third largest city in Canada, and remained so until overtaken by Vancouver in the 1920s. A boomtown, it grew quickly around the start of the 20th century, with outside investors and immigrants contributing to its success. The drop in growth in the second half of the decade was a result of the opening of the Panama Canal in 1914, which reduced reliance on transcontinental railways for trade, as well as a decrease in immigration due to the outbreak of the First World War. Over 18,000 Manitoba residents enlisted in the first year of the war; by the end of the war, 14 Manitobans had received the Victoria Cross.After the First World War ended, severe discontent among farmers (over wheat prices) and union members (over wage rates) resulted in an upsurge of radicalism, coupled with a polarization over the rise of Bolshevism in Russia. The most dramatic result was the Winnipeg general strike of 1919. It began on 15 May and collapsed on 25 June 1919; as the workers gradually returned to their jobs, the Central Strike Committee decided to end the movement.Government efforts to violently crush the strike, including a Royal Northwest Mounted Police charge into a crowd of protesters that resulted in multiple casualties and one death, had led to the arrest of the movement's leaders. In the aftermath, eight leaders went on trial, and most were convicted on charges of seditious conspiracy, illegal combinations, and seditious libel; four were aliens who were deported under the Canadian Immigration Act.The Great Depression (1929–c. 1939) hit especially hard in Western Canada, including Manitoba. The collapse of the world market combined with a steep drop in agricultural production due to drought led to economic diversification, moving away from a reliance on wheat production. The Manitoba Co-operative Commonwealth Federation, forerunner to the New Democratic Party of Manitoba (NDP), was founded in 1932.Canada entered the Second World War in 1939. Winnipeg was one of the major commands for the British...

answer the following question:

What city was considered a boomtown? 

Winnipeg