Triple

Target entity: Battle of Khe Sanh
Context triple: [I Corps Tactical Zone, South Vietnam, notableBattle, Battle of Khe Sanh]

• A. Battle of Khe Sanh chosen
  The Battle of Khe Sanh was a major and protracted siege in early 1968 in which U.S. Marines and South Vietnamese forces defended a remote base against a large-scale North Vietnamese assault, becoming one of the most famous and controversial engagements of the Vietnam War.
• B. Battle of Con Thien
  The Battle of Con Thien was a protracted and intense 1967 Vietnam War engagement near the Demilitarized Zone, marked by heavy artillery duels, siege-like conditions, and significant U.S. Marine and North Vietnamese casualties.
• C. Battle of Phuoc Long
  The Battle of Phuoc Long was a pivotal 1974–1975 engagement in the Vietnam War in which North Vietnamese forces captured Phuoc Long Province, revealing the weakness of South Vietnamese defenses and foreshadowing the final offensive against Saigon.
• D. Battle of Pleiku
  The Battle of Pleiku was a 1965 Viet Cong attack on a U.S. base in Vietnam’s Central Highlands that prompted major American escalation and the sustained bombing campaign known as Operation Rolling Thunder.
• E. Battle of Xuan Loc
  The Battle of Xuan Loc was the last major engagement of the Vietnam War, where South Vietnamese forces mounted a final, intense defense against the advancing North Vietnamese Army before the fall of Saigon.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.