Isn't this Aztlan the mexican group Mecha that wants to take over most of the southwest because they believe it is rightfully theirs?
Excerpt.......
The Problem Chicanos refer to "people of Mexican descent in the United States" or "Mexican Americans in general."3 Today, there are reasons to believe that Chicanos as a group are unlike previous immigrants in that they are more likely to remain unassimilated and unintegrated, whether by choice or circumstance — resulting in the formation of a separate quasi-nation within the United States. More than that, there are Chicano political activists who intend to marry cultural separateness with territorial and political self-determination. The more moderate among them aspire to the cultural and political autonomy of "home rule". The radicals seek nothing less than secession from the United States whether to form their own sovereign state or to reunify with Mexico. Those who desire reunification with Mexico are irredentists who seek to reclaim Mexico's "lost" territories in the American Southwest.4 Whatever their goals, what animates all of them is the dream of Aztlan.
http://www.diversityalliance.org/docs/Chang-aztlan.html