The Vietnam War officially spanned from 1955 to 1975. Its roots trace back to the struggle against colonial rule and the division of Vietnam into North and South. The U.S. became heavily involved, supporting South Vietnam in its fight against the communist North. The war was marked by significant conflict, societal unrest, and it ultimately led to the fall of Saigon in 1975, resulting in the reunification of Vietnam under communist rule. The consequences were profound, affecting U.S. foreign policy and society for decades.