Earth's mightiest warriors, yes.
You might want to consider that most of the population in the USA are Europeans. English, Germans, Italians, Spanish, Irish, French, even Russians, etc.
That is why Americans are also so good at war. It's like a second Europe. Sometimes we even get together, to make war around the world. We just rather it was not in our home again.
Now when I talk to Western Europeans almost none of them say they'd be willing to defend their country against an existential threat. They would just "go somewhere else."
That is how deep the trauma of the 2 World War runs in the European psyche.
Still, under an existential threat, you can bet that the vast majority would pick up weapons to defend their families and friends.
I can give you an example. During the July Crisis of 1914, the one that originated the Great War, the socialist parties (not communist) and worker unions in France and Germany stated publicly that if there was to be a war, the workers would not fight, would not make weapons, would not run the trains.
This was not a vain threat. Even he Generals started to consider "options" to deal with this possibility.
But when Russia declared war on Germany, and their armies mobilized and then advanced into Germany, everyone, including the socialists and unions publicly claimed that defending the country, the home, their families were more important.
And when Germany declared war on France, the same happened there.
The reality is that talk is cheap, but when push comes to shove, the people will rise to the occasion.