The Battle of Lạng Sơn was fought during the 1979 Sino-Vietnamese War, days after the Chinese People's Liberation Army (PLA) advanced 15 to 20 kilometres deep into the northern provinces of Vietnam. The fighting occurred primarily at the city of Lạng Sơn, a few kilometres from the Sino-Vietnamese border.

The Battle of Cao Bằng was fought between the Chinese People's Liberation Army (PLA) and the Vietnam People's Army (VPA) over the city of Cao Bằng and its vicinity, from the beginning of the Sino-Vietnamese War on 17 February, to 6 March 1979. Chinese forces ended up capturing Cao Bằng along with other territories in northern Vietnam. Despite the Chinese intention to battle against and defeat some major regular units of the VPA, the PLA found themselves encountering mostly small units of Vietnamese border guards and militia. After the capture of Cao Bằng, Chinese forces moved on to capture Đức Long, a town on Highway 4 on 3 March. On 5 March, following the capture of the Vietnamese capital of Lạng Sơn, as well as what analyst described as "other military successes along the 500 mile front", the Chinese forces then declared that they had “attained the goals set for them” in the 17-day border war and that they were withdrawing troops from Vietnam. Analysts located in Vietnam, had observed that some Chinese units in locations that weren't "hotly contested by the Vietnamese" have already commenced withdrawing in the past few days.

The Battle of Lào Cai was fought between Chinese and Vietnamese forces during the Sino-Vietnamese War. Though the Chinese sustained heavy losses in fighting, they were successful in capturing and occupying the city of Lào Cai and the surrounding towns.

The Battle of Đồng Đăng was the initial phase of the Battle of Lạng Sơn during the Sino–Vietnamese War, taking place in the town of Đồng Đăng and nearby positions between 17 and 23 February 1979.

The Battle of Móng Cái was fought during the Sino-Vietnamese War between 16 February and 10 March 1979 over the city of Móng Cái and other districts of Quảng Ninh Province that bordered the People's Republic of China. The battle broke out as Chinese People's Liberation Army (PLA) units launched diversionary attacks in support of the Chinese invasion in the major fronts of Lạng Sơn, Cao Bằng and Lào Cai. However, the Chinese failed to attract any Vietnamese reinforcements into the battle.

The Battle of Cao Ba Lanh was part of the Battle of Móng Cái, fought during the Sino-Vietnamese War between February and March 1979 near the city of Móng Cái and other districts of Quảng Ninh Province that bordered the People's Republic of China. The battle broke out as Chinese People's Liberation Army (PLA) units launched diversionary attacks in support of the Chinese invasion in the major fronts of Lạng Sơn, Cao Bằng and Lào Cai. A Chinese regiment clashed with a Vietnamese platoon, taking heavy casualties to seize the strategic peak which was later recaptured by reinforcements.