@Hepps to answer your question first I will make an Infantry unit called the Heppel's Highlanders. They will be given to Ontario at the start and are irreplaceable. They'll probably be a 2/3 infantry unit. Where would you like them placed? London? Kitchener? Toronto? .
@prastle you are correct that Trudeau Sr. was PM during the last couple years of the 1960s. In my alternative reality of events here is what happens that leads us to a Violent Quebec separation.
During the 1960's the FLQ launch all their violent attacks but to no avail. Alone they are not powerful enough to overthrow the government. Until 1967 when Charles Degual came to Canada and gave his Vive de Quebec speech which sparked the imagination and ambitions of the general Quebec and Francophone populace. During this time the Union Nationale party (a separatist conservative party) is in office in Quebec. Joined together with separatist groups like the FLQ and the support of the Francophone community they begin their attacks to separate from the rest of Canada and to free their Francophone Allies living in the Provinces of New Brunswick, Nova Scotia, Ontario and Manitoba.
At this time PM Trudeau has just been elected. However, an unprovoked attack on Ottawa dismantles parliament and the Federal Government is quickly dissolved. This leads to a coalition of different provincial forces with the goal of restoring the Federal Government.
That's basically the story behind it. The U.S.A will play a support role only (if Ontario and New Brunswick hold border towns they will be rewarded with Financial Aid from the USA).