Mexico time line by justin By Mrs.Whitbread Jan 23, 1200 Olmec civilization developed Jan 23, 1200 Olmec developed complex political system Jan 23, 1400 Aztecs settled in the valley of Mexico skilled farmers and engineers Period: Jan 23, 2000 to Mar 2, 2022 Maya civilization Mar 2, 2022 Mayans bult many towns Mar 2, 2022 Maya civilation declined around