The Chilean army of the 1973 is depicted using the wrong equipment such as G3 rifles, M48 tanks, and Fiat G91 aircrafts. The correct weapons would be FAL rifles, M4 Sherman medium tanks, and either Hawker Hunter or F-80 Shooting Star aircrafts.
Alba is eating KFC, but the KFC name/logo wasn't adopted until the 1990s (it was formerly Kentucky Fried Chicken), it's in a basket instead of a box, and the chain wasn't franchised in South America in the 1970s anyway.