Imagine a scenario along the same lines as the old TL "The United States of the Americas and Oceania", except instead of the point of the scenario being how to get the US to conquer the Americas and Oceania, it's how to get the US to conquer most of the world, if not the entire world, and directly incorporate these territories as states.
Based on that TL, let's say that the US includes two extra states--Quebec and Iroquois, two allies that initially joined the thirteen colonies in the ARW.
With that in mind, what is the absolute fastest possible, sustainable expansion of the USA from that point?
Could every single war, even ones like the Barbary Wars, be used to grab land?
When is the earliest the US could acquire land in Europe and mainland Asia? Even if the US could acquire land in Europe, Africa, and Asia, how do you get the historical US to even want to acquire that land?
I understand the premise is extremely unlikely and implausible, but it's not physically impossible. So in the most idealistic scenario, what happens?