OK Tilapia, how specific you were when you said "History shows many a treaty to be broken", or whatever **** you meant with that.
As usual, leftist ***** never answer the question, but they demand all their questions to be answered. Also, there is this constant "need" to accuse others of things they're doing. You see, If you stopped at K12, it doesn't mean everyone is at the same level than you. No Tilapia, they're not.
Second, there was Rio Treaty, which Mexico left some time ago, but shortly after they signed something called Perimeter Defense or Regional Defense in North America, not sure of exact name, but since you have K12, I'm sure you can manage to find it on your own.
OK Geoduck - Try not to get you knickers in such a knot.
It's just words on a screen and not worth your angst. Note also that I'm not a mindreader so what you and your mind's ear think you said may not always convey as such on the screen that the rest of us are reading.
As for "broken treaties", classic example might be that of Nazi Germany and Soviet Russia carving up Poland between them in Sept. 1939. They had a "Mutual Non-Aggression Pact (Treaty)" between them at that time. Barely two years later Nazi Germany 'broke' that treaty by attacking and invading the USSR/Soviet Russia. History is filled with such similar examples and such is what I was inferring to.
This is something I was implying you should have learned in course of your K-12 education, if not also in any college you may have attended.
As a single parent I raised my two sons through public education in the 1990s and noticed the decline in just a few decade from my time in the 1960s regards extend and depth of World History~USA History~Civics in general, Etc.
As a grandparent I notice the further decline in education quality in this area ever since via monitoring the knowledge/education of my grandchildren.
The USA and Mexico have a long history together and all I asked for as a more specific example of what you were inferring.
Note also that if one clicks on your name, then goes to your Profile here, and then clicks on the "About"; all we get is you claim to be a male and live in Michigan. We don't get anything on if you are a citizen or not, what your age might be, nor especially on your background, experience, etc. This sparsity of revelation is often common to Leftists and I'd be inclined to suspect you as such based on that secrecy.
As for myself, if anyone were to check my track of posts you'd see that I could be considered on the Right Side of Political Spectrum, at the least. Click onto my 'Profile' and 'About' and you find more information on me than you have willingness to provide on yourself (what might that say about your integrity and honesty?). For the most part you remain an unknown vague username to myself and others. Put that in your bong and toke it.
BTW, my usual way to cook tilapia is with a splash or two of either lemon or lime juice and a sprinkling of ground dill weed.