What great "Aztec Empire"? The Aztecs were in Central Mexico and were virtually wiped out by the Spanish and every other Indian tribe that allied with the conquistadores!
Well, somewhat right---they WERE virtually wiped out by the Spanish, but they were NOT in Central America. The Aztec captial city was where Mexico City stands today.
OTOH, what good does it do these wetback numbskulls to "conquer" those states, and turn them into duplicates of Mexico??