Final answer:
Guerrilla warfare, objectives, and escalation were key tactics used during the Vietnam War by both sides.
Explanation:
Guerrilla warfare is the use of unconventional tactics in warfare, such as ambush or sabotage, as seen in the Vietnam War where the Vietcong engaged in hit-and-run attacks.
Objective refers to having a clear goal, as demonstrated by the 'search and destroy' missions conducted by US troops to destroy enemy forces and supply lines.
Escalate means to quickly become more intense or serious, exemplified by Nixon's strategy of Vietnamization which involved escalating aerial attacks while withdrawing ground troops in the hope of South Vietnamese victory.
Learn more about Vietnam War here:
https://brainly.com/question/37209634
