Manitoba Day By minnow_ 1868 HBC sells Rupert's land to the DC 1869 Red River Metis call for independent Metis republic to be formed. 1869 120 men seized Upper Fort Gary Dec 8, 1869 Provisional government formed Mar 4, 1870 Thomas Scott executed by firing squad May 12, 1870 Manitoba Act comes into law Jul 15, 1870 Manitoba Act officially proclaimed Jul 15, 1870 Manitoba joins rest of Canada as 5th province Mar 10, 1992 Ottawa officially recognizes Louis Riel as founder of MB