The Aztec social order had four classes: nobility, commoners, serfs, and slaves. The ones who could own land were the nobility and the commoners.
The Aztec civilization was one of the most important during the Mesoamerican times, before the Spanish conquest. Aztecs were a warrior tribe that conquered other small tribes and forced them to pay tribute. That is why those tribes such as the Tlaxcalteans, and Chollulans helped Hernan Cortés to defeat the Aztecs. The great capital city of the Aztecas was Tenochtitlan, today, downtown México City.
Mercury is one of the most common toxic chemicals that can be found in contaminated fish. This is because mercury has become a common pollutant in rivers and other waterways since it it commonly used in mining and industrial operation, and these operations end up throwing the mercury into the waterbodies, where the fish absorb it.
spent more than $ 4 trillion or 36% of its GDP.More than 400,000 U.S. troops were killed in the defeat to defeat Nazi Germany, Italy and Japanese Empire.
