Today, 12:17 PM
The Russians actually did fight the French.
I'm going to present two scenarios:
First, let's imagine that after World War II, Western Germany, France, Britain, and the rest of Western Europe became anarchist. They would be overrun by the Red army within months. They wouldn't have the means to defend themselves against an organized and coordinated Soviet invasion. Sure, millions of people could buy rifles, but how many people can afford tanks, planes, and anti-aircraft weapons?
Second, let's imagine that America became anarchist. A foreign nation would have an extremely difficult time conquering the entire country, but they could easily take small parts of the country without any major repercussions. After all, why would someone in Florida feel the need to help a town in Maine from being subjugated.