You can't help but ask yourself, are they really "leading" their nations, or obeying US
orders?

Don't ask, my friend. Just watch their actions (and many times their words too, when they don't play the ambivalent hypocrisy game)

One can't help but wonder, when will these nations stand up for their
sovereignty?

Nations? In Europe? Oh... i don't see any nations there since many many years. I see a bunch of lost people without any national ​and moral landmarks (accept the doctrine of eat, sleep, entertain and the liberal OR the fascism boolshit).
So... there are no Nations (with big N) to stand up.
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* for the trolls:
national landmarks/patriotism are not equal to fascism.