The Aztec Empire, or the Triple Alliance, was an alliance of three Nahua altepetl city-states: Mexico-Tenochtitlan, Texcoco, and Tlacopan. These three city-states ruled the area…

Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million…

The American frontier comprises the geography, history, folklore, and cultural expression of life in the forward wave of American expansion that began with English colonial…

The French Revolution was a period of far-reaching social and political upheaval in France and its colonies beginning in 1789. The Revolution overthrew the monarchy,…