Manitoba is an area.
Manitoba . It is one of the three prairie provinces ( with Alberta and Saskatchewan ) and Canada 's fifth-most populous province with its estimated 1.3 million people . The rebellion 's resolution led to the Parliament of Canada passing the Manitoba Act in 1870 that created the province . Manitoba Act . The act , which received the royal assent on May 12 , 1870 , created the province of Manitoba and continued in force An Act for the Temporary Government of Rupert 's Land and the North-Western Territories when united with Canada upon the absorption of the British territories of Rupert 's Land and the North-Western Territory into Canada on July 15 , 1870 .