By the time the Spanish arrived their empire had experienced famine, drought and they were undergoing a civil war.
Important to note that archaeologists have found evidence of advanced trade routes established by Mayans throughout the New World by unearthed pottery in various locations as far away as the Mississippi River area.
Real calls for independence arose when during the Napoleonic Wars, Nappy put his brother Joseph Bonaparte (1808 to 1813 ) on the throne of Spain. Brought into question the idea of legitimacy. A revolutionary Junta had sprung up in Spain as well. It declared itself the ruling body of Spain in absence of the Monarch.
Who did the Mexicans owe allegiance to, the deposed monarch, the Junta, Joseph or themselves? Eventually Joseph is forced to leave the throne of Spain by force and the Spanish Crown is restored, but the seeds of revolution were sown.
Ground Movements - Intensities and Accelerations - Liquefaction Effects
The Great Earthquake of 19 September 1985 caused strong ground motions which lasted for about three to four minutes - a rather unusual duration even for a great earthquake . Strong shaking was felt over an area of about 825,000 square kilometers. Seismic intensities and accelerations differed from point to point depending on geologic conditions. The quake was felt by about 20 million people in Mazatlan, in the State of Sinaloa to Tuxtla Gutierrez in the State of Chiapas, and as far away as Corpus Christi, Brownsville, McAllen, Ingram and El Paso and Houston, in Texas and even in Guatemala City.