Very few threats can come unto a country with oceans as borders from sea to shining sea. However, our current northern & southern borders aren’t oceans, but 7,458 miles of mostly straight-lines through nowhere. If we conjoin with Canada, our current 5,525 miles long borders with them would solely become the turbulent northern seas. Similarly, if we push our current 1,933 miles long southern border southwards, to the Darién Gap, it would become a geographical choke-point between Central & South America, not even 100 miles wide. The last southern border change happened in 1854; with present-day Arizona’s border moving from a natural border, the Gila river, southwards to its current weird straight lines through nowhere lands, and present-day New Mexico’s south-west border moved southwards - from straight lines, to more & longer straight lines… It’s hard to imagine things outside of our lifetimes, but 1854 really isn’t that long ago; and the US had ownership of a 10-mile wide strip of land centered around the Panama Canal until 1979 – definitely not that long ago! Just because administrations since then haven’t had the guts to attempt another border change; doesn’t mean that it wouldn’t be the right choice of action – eventually, it’ll happen ~ whether we wait until far-future generations are forced to take action, or re-imagine our borders & preemptively take action in the near-future. With a current massive technological gap between our military & all those south of the border, this point in time may be our best chance of achieving these border re-imaginings with the lowest repercussions; we’d likely be able to take control of each country within days, and very likely without opposition from anyone but the cartels that we’d be targeting. The drug cartels have killed more North Americans than any war - likely all wars North Americans have participated in, combined! Having our southern boundary become less than 100 miles across would be much easier to control, and direct oversight over this border would significantly reduce the ever-increasing influx of South American drugs, diseases, migrants, and crime. It’s high-time we have direct paved & rail-line land-routes into South America to allow over-land commerce & tourism! Annexing these countries will bring increased safety & peace to people north of this new border – including the peaceful Central Americans ravaged by the jackals in their midst.
i. Wind-up; preliminary soft operations.
ii. Annexation
iii. Darién Gap border wall; construction
iv. Integration; the peoples & specific policies/implementations
English language
territories/statehood/citizenship
indigenous tribes recognition, & supplemental land appropriation. voluntary emigration.
v. Land routes
Roads; Pan-American highway completion
Railways; creation & benefits
thoughts/ideas on specific technology that could be built
vi. Clean-up; ongoing operations
vii. Wind-down
I: Conduct studies to see if there is interest in said countries for seceding to the United states. If interest is significant enough that a vote for succession has a high chance of passing, then use the resulting data in preliminary media campaigns & diplomatically pursue real public votes to be held for secession to the United States. Preliminary joint operations to eradicate cartels should also be conducted as a show of force to dissuade military members from attempting to defend if forced annexation is conducted in their country.
II: Utilizing the US military, +/-joint task forces with local troops &/or police (depending on how much they can be trusted, &/or if the country successfully voted to join the US), eradicate the drug cartels along a southwards push towards the Darién Gap. A second show of force could precede the annexation/secession-acceptance (for those that voted to secede) – from an initial blitz to wipe-out air & anti-air assets, to fly-overs of planes that are currently 2+ generations of technological sophistication beyond anything they have in their arsenals.
III: Create a border wall somewhere across the Darién Gap; a much prettier, more long-term wall than the current one – one that can hold-up to the rainfall in that region; like a stone, &/or concrete, wide-wall that can be walked upon the tops of. Additionally, begin building advanced detection system(s) around the entirety of the US to detect boats, submarines, and air & space traffic.
IV: Language~culture barrier is an issue; but, we shouldn’t think within our own lifetimes; significant historical changes take many lifetimes. Although, it could likely be fairly quick – for instance; imagine a coordinated effort of a more Paul Pimsleur-like method of immersion & spaced repetition; with english words that have been repeated enough times, then fully replacing their spanish equivalents in all written & spoken contexts, & media personalities using the english words that have been replaced; where all media; tv, movies, radio, road signs, written, and even the internet/websites/apps/smartphones could replace, already designated as having been replaced, spanish words to their english equivalents – first utilizing a spaced-repetition method of introducing new english before fully flipping those words to english; at-first, words that are already very similarly written &/or pronounced between spanish & english, & possibly some others to allow the people to learn the words on their own – like “ALTO” → “STOP”; spanish & english have almost exactly the same latin characters alphabets, & seeing alto signs instead say ‘STOP’, they would likely be able to understand & learn, & pronounce, the word on their own; any other well-recognized things with text, could switch to english immediately. And, over a period of, say, 8years, all spanish words are thus replaced with english ones. Mixed subtitles could be required in all media during that 8years transition to help teach the spellings of replaced, now english, words. All of this can be automated with a top-level api telling connected systems what words, when & how long to have them replaced & a growing list of words for permanent replacement – once all words are replaced with english ones, the system can be phased-out. Once the people of these countries have switched to using the english language outside of their homes, integrated better into english-language-using culture ~ which could be combined within the coordinated switch-over + language transition to english, and the cartels no longer exist; then, they could become citizens, &/or, the countries could become territories of the United States, with possibilities of splitting them up into new states for a farther future to decide upon. In the meantime, anyone from the annexed Central American countries could be allowed to legally work in the US. Indigenous Tribes of the area, that don’t already have such, should be recognized, contacted, & offered the chance to own independent chunks of land – reservations, if they so want ~ separate territories with similar status’ as reservations in the US & in Costa Rica. Additionally; descendants of Conquistadores may be offered boat & plane rides to Spain & Portugal, if they so wish; else, eventual citizenship can be given to those who pass an english language proficiency test (& preferably, fail an NPC/nonselfthinking-wokeness test).
V: Build high speed & high capacity rail lines & roads from South America, through the Darién Gap, all the way up to North America. This could significantly lower our dependence on globalized supply chains that put us at the whims of super-polluting container ships going to&fro from Asia, today. North American companies would have a commercially viable access to build factories in South America. The rail lines could be all-electric, clean energy powered (like 5th generation nuclear reactor(s)) high-capacity cargo trains, & super-speed Japanese maglev passenger trains.
VI: Occasional excursions, by the US military, into Columbia, Ecuador, possibly Venezuela, and other South American countries, may also be needed, at times, to wipe out cartels located there - in the post Darién Gap border wall future. Complete the construction of advanced detection system(s) around the entirety of the US & Central America & operate them, as needed.
VII: With peaceful, easy to manage borders, comes the benefit of not having to worry about them much: only the Coast-Guard/Navy would be needed from then on to help protect our sea to shining sea, near 360 degrees, coastal borders; while the border patrol would have less than 100-miles-across to patrol of the US’ sole over-land border (with Columbia). As such, the border-patrol could be reduced, significantly, with additional reductions to the military also something to consider in the future.
Possibly, Belize could be left independent; as it’s out-of-the-way on the pathway to South America, & already english speaking; becoming the Macao/Monaco/Luxembourg/Hong Kong/… of the Americas. Bonus points given to exile flashy kid-socks Justin Trudeau there (he’d be closer to his fatherland of Cuba, anyways).
From 7,458 miles of borders to under 100; imagine that future where the only real threats would have to travel over, or under, the surrounding oceans, through the air, from space, or through the very narrow Darién Gap - now protected by a Yuge wall across it. Only things like oceans, mountains, rivers/river-valleys, deserts, forest/jungles, swamps, etc., create good geographically/geologically/ecologically, long-term stable borders, and the Darién Gap is the best candidate of them all! Why wait for a far-future time when the border problems have become large enough that re-making the borders is inevitable? Over 100-thousand drug related deaths per year already seems like atomic bomb level significant, yearly! We shouldn’t need to wait for the cartels to get actual atomic bombs before taking action – which, considering that they aren’t all idiots, is a possibility! There may be some pain in doing thusly, but right now may be the greatest power discrepancy between the US military & all those countries than it’ll ever be henceforth. It would be historical change that would put the administration, with that long-term foresight, into a foundational changes level of historical remembrance. Accomplishing this change would set-up the US for thousands of years of peace, & prosperity - even if it doesn’t last for thousands of years; at-least we’ll have positioned it for that level of success – the current 7,458 miles of borders only spell-out instability; past, present, & future – great for drama, gossip, and fear mongering headlines; but not for fortuitous lengths of time. By annexing Canada, we would effectively make our northern border zero miles wide ~ the surrounding tumultuous northern oceans, hard to traverse, & monitorable via sensors, satellites, and the Coast Guard; and by annexing Mexico, & Central America, our southern border would become under 100 miles across! We would create a nation that has a stable foundation to last for thousands of years in peace & prosperity; shaping our own best possible future preemptively in-order to save countless future lives - not just for us, but for everyone north of our new, easily defensible, minuscule, and sole, overland border!
don’t plan on working on this again for some time; please pre-forgive any, possibly month-long, delay in response 
Look forward to working with you(s); any comments, suggestions, coauthoring, etc., are welcome.
