If the US invaded Panama to secure it's warm water ...
Oh wait.
Oh wait.
Why and how US will invade its colonies? Italy and Germany cannot resist any decision made by US. They have US military bases on their soil and their own army is deliberately made smaller and weaker than personnel of US military bases.
However comparing it to a superpower is nonsensical. The US has the 3rd largest military in the world, beaten only by India and China who have populations in the billions.
But just below the US is Russia with the 4h largest military in the world, and the largest (by a huge margin) on the European continent.
Now the era of colonialism was only possible due to vast technological differences between the two parties, and the good luck of the Europeans finding empires in turmoil (Songhai, Benin, Aztecs, China, etc.). It’s extremely difficult to subjugate much less rule a far off colony. The US couldn’t even manage it with Afghanistan so I doubt they’d have much luck with Germany.
On the other hand, it’s much easier to conquer your neighbor, push them back and simply put your own people in place. Russia did that for about 50 years and ruled half of Europe. I would wager Germans have more to fear from a revived Russia run by an KGB agent who grew up during the time of Empire, than a US who was most recently run by a television reality show host.
Apart from that which parts of it have more power is more interesting, but also debatable.
Anyways, apart from some exceptions (for show) the german military is mostly a very expensive army of clowns,
which can't even manage to transport its own troops reliably, or politicians for that matter.
Been there, done that in the 90ies. Meanwhile I haven't heard or read anything which would change my mind about that.
Rather the opposite.