Had an idea after you left for a third faction, “Nationalists”.
I am of course looking at the basic three factors of warfare by classifying belligerents into three catagories:
“Superpower” – Is self-relient in every aspect but very vulnerable to popular support (or rather lack-thereof); it must tread carefully as it easily “upsets” civilians. Huge income/military power.
“Nationalist Government” – Much less income/military power than a Superpower but also does not “offend” the general population nearly as much, ie it takes a lot more for a Nationalist Government to upset its own population than it would a foreign power. Different forms of income (Superpowers get all their income “from home” whereas Nationalist Governments have to invest in building theirs), also some Guerilla/Insurgent-like capabilities.
“Guerillas/Insurgents” – The underdog, as we talked about.
This would allow for multiple types of “war”
Superpower vs Superpower – lol standard war? booooring
Superpower vs Nationalist Government – a la invasion of Iraq, Vietnam War (US vs North Vietnam), Israel vs Palestine, Russia vs Georgia, etc – a Superpower doesn’t like how things are going and so invades
Nationalist Government vs Nationalist Government – a Civil War in the traditional sense, a la North Vietnam vs South Vietnam, or war between two “lesser” countries a la Iraq vs Iran, India vs Pakistan, Georgia vs South Ossetia.
Nationalist Government vs Guerillas/Insurgents – Insurgents would do better militarily against a Nationalist opponent than a Superpower but also finds it harder to use politics as a tool to sabotage popular support for their enemies, forcing them to change tactics.
Guerillas/Insurgents vs Guerillas/Insurgents – Two rival factions fighting for control in a really interesting-sounding way.
Nationalists would be kind of a cross between a Foreign Power and an Insurgency, having aspects of strength both militarily/financially but also politically, but not excelling in either (at least not as much as the others in their respective fields), forcing a Nationalist player to pay greater attention to the balance to win.
Multiplayer games would be mindblowing. Superpower vs Nationalist Government vs Insurgency FFA? Would be insane!