The most atrocities committed in history, and why? The Aztec Empire. The actions of that town even terrified the Spanish who would later conquer them. One of the reasons why the conquest of Mexico was so easy and quick is because the local tribes that had been conquered by Aztecs rebelled against their masters because they preferred to submit to Spanish control. The Aztecs sacrificed enormous numbers of men, women, and children. They ripped out their hearts while they were still alive. In spring, they sacrificed their children to the god Tlaloc to ask him for rain so that their crops would grow. It was believed that if the child cried on the way to the sacrifice, the rain was guaranteed for the rest of the year, so they riddled them with thorns to ensure a good omen. After the death of those sacrificed (80,000 men were killed in a single ceremony), the priests and nobles ate their mutilated bodies. In the Aztec festival of Tlacaxipehualiztli nobles were asked to offer human s...