Again this will probably contradict what's gone before but again this isn't the final agreed versionof events.
What BlackMage has done is a good start but I think the timescale would need compressing. I can't see Canada and Britain wainting several years to bring Quebec to heel. Also this is a continent wide war so we don't have to fill in the entire eight years with constant action in just one area. The war in the North East could procede in fits and starts as crisises emerge in other parts of the FUSA.
1987: The President of the Rocky Mountain Confederation dies after being in power for 40 years. Given that the RMC's government is both massively corrupt and largely decentralised no clear successor emerges. Various politicians and military figures start jockeying for power.
1988: Pierre Breton leader of the Quebec Nationalist Party (PNQ) brokers a secret deal with the French Syndicalist Front (FSF) for covert funding.
1989: World oil prices crash and a worldwide recession begins.
1990: RMC: Public sector workers go on strike when the government defaults on paying them.
Republic of Texas: Hit by loss of oil revenue the Texan government revives an old border dispute with the Republic of Louisiana (RoL) in an effort to distract the Texan population form their domestic problems and possibly to gain a stranglehold on Mississippii river traffic.
1992: In responce to a request from the RoL government a battalion of French Foreign Legion paratroops is dispatched to New Orleans as part of "a joint defence exercise". An RN cruiser also pays a port call to the city. Texas backs off on it's demands. For the moment.
1993: The PNQ makes gains in local elections in Quebec. At the moment the PNQ presents itself as a party that will put Quebec's interests first rather a seperatist movement.
1995: The global recession begins to end but the RMC's economy, never strong, has crashed. Unemployment and hyperinflation are at unprecedented levels, the queues outside shops which rarely have enough food on the shelves anyway stretch for blocks, heating and lighting have become almost luxuries. When armed gangs looking for food and loot start crossing the Montana/British Columbia border first the RCMP and then the Canadian Army are sent to protect the local citizenry.
Pacifica, lacking a large heavily armed police force if forced to send units of the Pacifican Defence Force to the border. Co-operation between Canadian and Pacifican forces increase.
1996: Pierre Breton is elected Premier of Quebec. He has run on a platform of opposition to the increasing cost of operations in British Columbia and the position of some BC politicians that Canada should militarily intervene in the RMC to bring some order to the increasingly lawless nation. When an RCAF transport crashes on a Montreal suburb anti-military and anti-central government feeling peaks. The Canadian Security Service believes the plane crash was no accident but has only circumstancial evidence.
Meanwhile the situation in the RMC continues to worsen and the Canadian representative in the Commonwealth Assembly in London requests aid from the rest of the British Empire. In a show of strength troops from Britain, Ireland, New Foundland, Australia, India, New Zealand, South Africa, Rhodesia and Kenya start arriving before the end of the year.
1997: An explosion at a power station in Wyomming kills 62 people and cuts off power to millions. Power workers across the RMC go on strike. Underpayed, overworked and trying to keep increasingly obsolete equipment working on a shoestring budget they have had enough. The power workers strike soon becomes a general strike which in turn becomes a series of mass popular demonstrations.
In one such demonstration troops of the RMC Militia open fire on the crowd. As levels of gun ownership and anti government paranoia are both high in the RMC some in the crowd fire back.
Within 24 hours the RMC is in a state of civil war.
As refugees and armed bands who pey on them cross into Canada and Pacifica both nations declare a state of emergency and mobilise their armed forces.
Taking advantage of the chaos in British Columbia Breton declares first that Quebec is neutral in "this Anglo-Saxon misadventure" and when denounced by Ottawa that Quebec is now an independent nation.
New England and Quebec invade New York; New England after a border incident and because of historic rivalries, Quebec to stop New England from grabbing all of New York's territory before Quebec can.
At first the invasions are seperate but as New Yorker resistence hardens and as some suspiciously well armed "volunteers" start arriving from the Free Republic of Pennsylvania an alliance of convinience is formed.
1998
Vermont Revolt begins, with partisan fighting from the so-called VC, Vermont Comms, disrupting New England war efforts. Quebec and New England are still allied, but this is becoming increasingly fragile.
Quebec declares war on New England over division of New York's territory. VC rebels seize Montpelier and much of southern Vermont, and declare the Second Vermont Republic. Elections are held, with the Vermont Socialist Party (the political wing of the secessionists) beating the Liberals (former New England Whigs, who dominated New England politics; the Whig Party in Vermont split, with the main body boycotting the elections), against allegations of vote-rigging.
A Commonwealth Expeditionary Force enters Quebec to "remove the criminal government of the NPQ".
German troops start arriving in New England to aid against Quebec's forces. Officially the Germans are only to help protect New England's territory from outside agression but soon become involve in operations against the New Yorkers.
The last resistence to Commonwealth forces collapses in Quebec and a Commonwealth Expeditionary Force crosses into New York to finish off the PNQ militia and to aid Canada and Britain's long standing allies in New York and Pennsylvania.