The "far north" is contextual. That part is talking about an area historically known as La Gran Chicimeca [1]. It's only a few hundred miles from Mexico City.

The "far north" is contextual. That part is talking about an area historically known as La Gran Chicimeca [1]. It's only a few hundred miles from Mexico City. [1] https://en.wikipedia.org/wiki/La_Gran_Chichimeca https://en.wikipedia.org/wiki/La_Gran_Chichimeca