here’s an explanation to you’re question
The United States interpreted the skirmish that took place when General Zachary Taylor led troops into the disputed territory near the Rio Grande as an act of aggression by Mexico. They believed that Mexico had violated the border and attacked American forces, which led to the outbreak of the Mexican-American War. The United States saw this incident as a justification for their military actions and as a means to protect their territorial interests.
hope this helps!
