1964 Brinks Hotel bombing
The Brinks Hotel in Saigon, also known as the Brink Bachelor Officers Quarters (BOQ), was bombed by the Vietcong on the evening of 24 December 1964, during the Vietnam War. Two Vietcong operatives detonated a car bomb underneath the hotel, which housed United States Army officers.
Source: Wikipedia — 1964 Brinks Hotel bombing (CC BY-SA 4.0)