Original sentence: Due to the association of Aztlán with growing Mexican nationalism among Mexicans in the United States, and its northern location, the name Aztlán was taken up by some revolutionary Chicano movement activists of the 1960s and 1970s to refer to the Southwestern United States that Mexico lost or sold to the United States that they suggested rightfully belonged to Mexico, the Treaty of Guadalupe(1848) and the Gadsden Purchase(1853) notwithstanding.The Plan Espiritual de Aztlán, as well as the names of several organizations, such as MEChA, (Movimiento Estudiantil Chicano de Aztlán, "Chicano Student Movement of Aztlán"), an organization that gained notoriety for making claims against the United States' occupation of Aztlan on behalf of Mexico
Edited sentence: )  The Plan Espiritual de Aztlán, as well as the names of several organizations, such as MEChA, (Movimiento Estudiantil Chicano de Aztlán, "Chicano Student Movement of Aztlán"), an organization that gained notoriety for making claims against the United States' occupation of Aztlan on behalf of Mexico.Aztlán appears in the title of the 1968 manifesto issued by the radical Chicano youth movement that called for the liberation of that land from colonial occupation by the United States, even though Mexico "liberated" the same land from the Spaniards only 27 years before (and which Spaniards had liberated from native American Indians before that.Due to the association of Aztlán with growing Mexican nationalism among Mexicans in the United States, and its northern location, the name Aztlán was taken up by some revolutionary Chicano movement activists of the 1960s and 1970s to refer to the Southwestern United States that Mexico lost or sold to the United States that they suggested rightfully belonged to Mexico, ignoring the Treaty of Guadalupe(1848) and the Gadsden Purchase(1853)