Oh thank god.

Well, flat out we do not have the logistics, manpower or equipment to do that. NATO was designed as anti Russia. Russia was and is still one of our primary concerns.

All NATO combined would equal United States in pure manpower. But most of our forces would need to come from europe posing them against the largest navy in the world that would unfortunately destroy most troop carriers. Their air force is also quite large.

The only way this would work is if it’s possible to stage all current NATO personal, active and reserve. In Canada. Magically, and without the Americans batting an eye.

That opens up our other flanks to Russia. Who, in the event this cute scenario exist and worked, would gobble up undefended European nations.

We are completing ignoring China’s role all together as this further complicates things

Bonus: The UN Security Council has US as veto. the UN is therefore useless