What ways did itzcoatl set the course for expanding the Aztec empire?

Itzcoatl, the fourth ruler of the Aztec Empire, laid the foundation for expansion through strategic alliances and military conquests. He formed a crucial alliance with the city-states of Texcoco and Tlacopan, known as the Triple Alliance, which significantly enhanced the Aztecs' power. Under his leadership, the Aztecs launched successful campaigns against neighboring territories, incorporating them into their empire and establishing a tribute system to bolster their wealth. His policies and military strategies were pivotal in transforming the Aztecs into a dominant force in central Mexico.