How many nations would it take to invade Russia?

You just pointed out why Russia invaded Crimea. Ukraine was moving towards closer ties with Europe, and possibly entry into the EU and NATO. This scares the poop out of the Russians, since most of the coastline around the Black Sea belongs to NATO-aligned countries like Turkey, Bulgaria, and Romania:

https://search.yahoo.com/search;_ylt=AvjYvalpUP6Vl...

There's a reason why the USSR installed puppet Communist regimes in Poland, Romania, and other Eastern European states - they wanted a buffer zone between the USSR proper, and Western Europe. The US would, and has done the same kind of thing when it has seen threats to its territory.

The same problems that Hitler and Napoleon had, like overly-long lines of communication and supply, wouldn't be nearly the problem that it was in 1812 and WWII. It wouldn't be a matter of how many countries, since any invasion would have to be done under the aegis of NATO.

The weather defeated the Germans just as the Channel won the Battle of Britain

You don't invade a country like Russia. It would mean immediate nuclear winter. But the CIA overthrew their government in 1991 by promising cars and televisions and stuff and supporting that alcoholic, Yeltsin.

Iit's like how many balls of string would it take to reach the moon.

One, if it's big enough.

It does not matter how many countries as which counties

like all of them including aliens man

confusing thing lookup on yahoo and bing that could help

i and chuck noris can take over sankt petersburg - you can take moscow.

It can't be done.