Tet Offensive begins in 1968 - Vietnam

The Tet Offensive was a military campaign during the Vietnam War that began on January 31, 1968. Forces of the National Liberation Front for South Vietnam, or Viet Cong, and the People's Army of Vietnam, or North Vietnamese army, fought against the forces of the Republic of Vietnam (South Vietnam), the United States, and their allies. The purpose of the offensive was to strike military and civilian command and control centers throughout South Vietnam and to spark a general uprising among the population that would then topple the Saigon government, thus ending the war in a single blow.
The operations are referred to as the Tet Offensive because they began during the early morning hours of 31 January 1968, Tết Nguyên Đán, the first day of the year on a traditional lunar calendar and the most important Vietnamese holiday. Both North and South Vietnam announced on national radio broadcasts that there would be a two-day cease-fire during the holiday. In Vietnamese, the offensive is called Cuộc Tổng tiến công và nổi dậy ("General Offensive and Uprising"), or Tết Mậu Thân (Tet, year of the monkey).
NLF/NVA killed by U.S. air force personnel during an attack on the perimeter of Tan Son Nhut Air Base during the Tet Offensive

Tet is a Vietnamese word which means, New Year's festival