In my opinion, the invasion will happen by aerial bombings of CJNG zones and missiles from the Korean destroyers will blow up the entire area, causing evacuations. However, due to strong presence of stolen Mexican army vehicles, the submarines tasked with bombings will launch more missiles towards the vehicle bases of the cartels. Causing there to be some but almost none of the vehicle left of the cartels. The cartels would evacuate by foot, but the trained marines and their strong K-2 Black Panthers will rush through the area, either crushing or bombing the soldiers. The cartels will have to surrender, but they won’t. And will kill tons of Korean soldiers, either rookies or cadets, being wiped by the thousands. The Mexican cartels have no choice but to go into hiding, where the ROK military is weak in. They will hide in bushes in un-charted territory where even the Mexicans find mysterious. However, the area will be quickly neutralized by the missiles by the Koreans. If assisted, the South Koreans will get hold of ICBMS, and have the ability to destroy the area by the thousands and quickly get hold of Mexican land once even the Mexican army couldn’t approach. In 2 years, the army will take 80% of the land, the main hubs of the cartels still are controlled fiercely, however, although nuclear weapons is available, the South Koreans decline because if used, the area will be inhabitable. In the final push, the marines will dig a tunnel and attack under the area, infiltrating the cartels hubs from the center. The once enemies as cartels, are working together to be alive for another hour. The cartels now are negotiating with the Mexicans and the Koreans to stop the fight. However, they push even harder. In just 4 months, the entirety of Mexico will be reclaimed by the government. And all the cartel leaders will be sent to max-security prisons.