Mexicans ... for defensive...
You will start with two Town Centers, and remembering that the additional Town Center, the "Presidio" acts as a fort and you can build more of them later.
Interesting detail, with each researched technology you get a "pistolero", so you will not have to spend much on the army at first ... do not forget to carry in the deck the "Colonial Militia" cards and what lowers the population space occupied by the "pistoleros"
"In nomine Domini"
"Ad Majorem Dei Gloriam"
"Um Deus, um rei, uma fé, uma lei"