Mexico City was the capital of Mexico. It was nuked in the Great War.
United States invasion of Mexico
In the year 2051, seeking to protect business interests and their oil supply, the United States began to exert increasing pressure on Mexico, citing the political instability and pollution stemming from Mexico as a threat to the United States. Various economic sanctions served to destabilize Mexico, and the United States military entered Mexico to keep the oil refineries running and making sure oil and fuel continue to make their way north across the border (at Mexico's expense).
The Great War
In 2077, the city was destroyed by nuclear weapons, turning it into a radioactive ruin. Many citizens were forced to flee to surrounding settlements and farmlands. Not long after the war, scavengers and raiders started to infest the city and criminal activities became bigger than what they were before the war.
Mexico City is mentioned only in Fallout: New Vegas.
- Mr. Handy design document
- Fallout Bible 0 Timeline repair: Second strike: "2051 Seeking to protect business interests and their oil supply, the United States begins to exert increasing pressure on Mexico, citing the political instability and pollution stemming from Mexico as a threat to the United States. Various economic sanctions serve to destabilize Mexico, and the United States military enters Mexico to keep the oil refineries running and making sure oil and fuel continue to make their way north across the border... at Mexico's expense."
- Raul Tejada: "I grew up in a place called Hidalgo Ranch just outside Mexico City. It wasn't much, just a bit of farm with a house for three generations of Tejadas. I wasn't the best-behaved kid. I was quick with my hands, with a pistol or a wrench, and I wasn't afraid to get into fights over it. I never killed anybody, but I had my share of run-ins with the police. Mostly my family kept me in line. This was before the war. We were far enough away from Mexico City when the bombs fell that we missed the worst of it - but things got bad quick."
The Courier: "Go on."
Raul Tejada: "Just a few days after Mexico City was vaporized, refugees started pouring down the road to our ranch. We helped who we could, but there were so many. Eventually, my father started turning people away before we ran out of food. Things got violent. My father and I got our guns, and we drove them off."
(Raul Tejada's dialogue)
- Raul Tejada: "After the fire, I knew my sister and I couldn't stay at Hidalgo Ranch anymore. The refugees still wanted me dead - they even put a bounty on me. I remember how scared Rafaela was. I told her if she came with me, we'd see the vaqueros - she used to love the rodeo, especially the trick riders. We figured maybe we could find help in Mexico City - we were young, we didn't know what had happened, really. We didn't understand about the bombs."
The Courier: "Wasn't Mexico City basically annihilated in the Great War?"
Raul Tejada: "I don't think it was as hard hit as DC or Bakersfield, but it was bad enough. By the time we got there, the city was a radioactive ruin. Still, the city was full of looters, already forming into the beginnings of raider tribes. Crime was bad before the War, but now it was a nightmare. We were living like scavengers, scraping by on what little food we could find, always looking for medicine for my burns. And then, of course, the radiation started to kick in, turning me into this handsome devil you see before you."
(Raul Tejada's dialogue)