Constitution Documents (what, why, when, where, who) Constitution 1867: WHEN: March 29, 1867 WHERE: Manitoba today WHAT: During the time there, they discussed the rules and policies and sharing of powers. WHY: The province of Canada was trying to get other provinces to join confederation as they saw many benefits to joining confederation. WHO: members of parliament (including the prime minister), province of Canada (Ontario and Quebec), Nova Scotia, New Brunswick