Alex is a bit of a liar about the military here. You can't just be an undocumented immigrant and join the military, although you also don't have to be a citizen. There's a middle ground that Alex is pretending doesn't exist, which is if you're a permanent resident but not a citizen. You can have a green card and join the military, for example. Sure. Alex is pretending you can just illegally cross the border and then show up at a recruitment center and they'll take you in and give you a uniform and a gun. That's absurd. That's not how any of this works. You have to be a permanent resident and you have to pass certain English fluency tests in order to be able to make it even in the door. This is how our country has always worked. And approximately 5,000 non-citizen applicants enlist each year. This isn't the majority of enlistments like Alex is saying. It's closer to 6% of the total number of new recruits.