Alright this post is about cities that were turned into war zone by the drug lords clashing with each other and the government examples: Jaurez and Favelas. First tip don't go there to begin with, but let's say you get lost or have to go there passing through.
let's do the lesser of the two having to pass through, keep your doors locked at all times. watch all of your mirrors if someone is getting too close that isn't a police officer, take off don't think just do it, most people there are well armed and you can be held for ransom or sold in prostitution. If that happens you have 72 hours left, then you die.
Next is your worst case scenario you get lost, if your in a car it's one thing, but lets say your on foot. First thing is first, you have to blend in, if you stand out in anyway that makes you a target. Buy cloths from the local stores to change into, wash off the make-up. Do not do anything to give away the fact you aren't from town. Be careful who you ask from directions from, buy a map even, coz your first stop should be the US embassy, they'll get you where you need to go, and whatever you do don't lose your passport or you are dead. You can't get in the embassy without an American passport, and that goes for all embassies, go to your country's embassy with your passport, that's your only safe house.
One last scenario, on your way to the embassy you get held up, you have two choices, life or death, its your choice. You give him your money and you become useless to him so he kills you. This isn't a mugger, this is a gang banger hopped up on cocaine. Now your second choice you have to kill him, pull out your wallet like he wants, when you get your hands up drop the wallet on the ground. When that wallet hit the ground he will look at it, its human nature only trained special forces can resist this reflex. You have turn instantly, DO NOT THINK!!!!!! YOU TURN AROUND, GRAB THAT GUN, PUT IT IN HIS CHEST, AND PULL THE TRIGGER UNTIL IT QUITS FIRING!!!. If you don't you will die, only you can decide if yours or his life is more important to you.