This document discusses key events in the Vietnam War from 1964 to 1968. It describes the Gulf of Tonkin Incident that led to the Gulf of Tonkin Resolution and greater US involvement. It outlines major US bombing campaigns like Operation Rolling Thunder. It discusses the escalating US troop levels and failed search and destroy strategy. It also covers the Tet Offensive in 1968 that shook US public support for the war and contributed to LBJ not seeking re-election.