In 1914 the first Dingman well blew in and started the first Calgary Oil Boom. Unfortunately, the outbreak of the First World War (then known as the "Great War") ended the city's boom. During the war, several internmnet camps were set up in the rugged Rockies for prisoners of war and foreign nationals (mostly Ukrainian).
1920 was a big year for the muntain parks, as Jasper Park Lodge opens and the Grand Trunk Pacific Railway and the Canadian Northern Railway merge to be Canadian National. The first dam at Lake Minnewanka near Banff is built. In 1923, The Banff-Windermere road is completed, finishing a construction project underway since 1912. In 1924, The National Geographic Society completes its first survey of the Columbia Icefield. An in 1928, The Banff Springs Hotel is completed. In 1936, Sunshine Village Ski Area opens, but ski lifts were not added until 1945.
More history of the Canadian Rockies