The best I can tell, most food items merely tell you where they were distributed from, not the actual place of manufacture. Lots of reasons to be vigilant alright - many contain one or more of soy, canola, msg, and/or GMO foods and other unhealthy ingredients.
The ideal would be to assemble several months of only healthy food - but again, I am talking about as soon as possible initially getting together a couple of months or more of food and other items to survive on - and then looking towards improving the qualtiy of food and other supplies and planning for long term healthy diet and lifestyle.