How far back a PoD for *no* common borders with OTL.

I've seen people do ATL maps where the question is how many of the OTL borders do you keep.

Assuming a world where no single country controls more than 150% of OTL USSR, (to remove the Nazis rule everything case), how far back do you have to go before no land borders are the same as OTL?

As far as I can tell the oldest border currently existing is the Franco-Spanish border and that dates to the Treaty of the Pyrenees in 1659.
 
The Czech border has been pretty constant (a few alterations now and again but mostly unchanged). There is a fair number of borders that would probably pop up again, such as the UK-French border. ;)
 
The era of the Thirty Years' War is the most recent one can go with that POD, anything from the era of say, the megastate Roman Empire obviously will produce very different virtues by the ATL 2011.
 
In general borders which follow geographical features (mountain ranges and major rivers) are likely to be the same or at least similar to OTL, while more arbitrary boundaries (like US-Canada border) are likely to be very different. So the Pyrenees, Alps, Rhine, and Danube will be boundaries of whatever polities arise in the area, while the Balkan peninsula is likely to be very differently divided up. The same is true outside Europe, of course.

To get that result in Europe would require a POD before the rise of Rome, since the boundaries of the Roman empire have persisted to the present day in many cases. The PODs for India and China would have to be even earlier, for similar reasons.
 
We've seen that no historical change can alter the Russia-Kazakhstan border; apparently that one requires different laws of physics :p;):rolleyes:
 
For literally no common borders, likely really early (though that depends on whether you mean only entire borders (i.e. large-ish bits and pieces are fine) or no major equality at all), as the natural boundaries (Alps, Caucasus, Pyrenees, Danube, etc) are all too likely to occur in any TL when they aren't completely surrounded by one state.
As such, pretty much the only way to do it without some weird pre-rise-of-civilisation PODs: united Europe with bits of Asia (Turkey, Caucasus etc), with a pre-1700-or-so POD otherwise. The rest of the borders, with minor exceptions, aren't nature-based, so that doesn't get any problems; and Europe has less area than the USSR did, so that doesn't clash with the OP premise, either.

For very few common borders, 1700 will likely do it. 1800 probably won't, at least in Western Europe; I'm not sure about the rest of the 18th century. :)
 
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