I think I'd prefer hypothetical, if only so that the accuracy of maps isn't too much of an issue. And if you want it not v tank heavy (think I read this early), you'll want 'interesting' terrain, ie somewhere a grunt can pop out at you & say "Hi dead man!" Which leaves a lot of Russia (except the Caucasus) out of it.
Are we looking modern? If so, I have a couple of suggestions:- Hungary tries to reclaim Transylvania from Romania (oobs available, maps shouldn't be too much problem); Spain retakes Gibraltar, prompting a UK Task Force similar to the Falklands (and who cares about the EU?
; Morocco takes back Ceuta & Melilla from Spain; Al Qaeda capture the Canary Islands - joint UK/Spanish task force to rescue the tourists (on second thoughts, leave them to Al Qaeda
). All the above can develop (as can a S.American conflict, which I also like the idea of, but not sure how the map situation would work out).
Will go with the flow - make a decision, DD