Where does this reputation that Russia is "invincible" come from?

It's so ridiculous that I wonder how some people can seriously believe it.
Where does this reputation that Russia is invincible come from?
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24 d
I'm talking more in terms of history, a lot of people say "Russia hasn't lost practically any wars" and so on. And I see this very often on the networks
Where does this reputation that Russia is "invincible" come from?
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