Complex sentence: Economic and social conditions under Mexico were so bad that in 1837 Genízaros, along with Pueblos and others revolted against the Mexican Government, cut off the head of Albino Perez (the Mexican Governor), and killed all of the Mexican troops in Santa Fe.
Split into simpler sentences: Economic and social conditions under Mexico were so bad that in 1837 Genízaros, the Pueblo tribes and others revolted against the Mexican Government. Rebels cut off the head of Albino Perez (the Mexican Governor), and killed all of the Mexican troops in Santa Fe.