First Taiwan Strait Crisis

The First Taiwan Strait Crisis (also known as the Formosa Crisis, the 1954–1955 Taiwan Strait Crisis, the Offshore Islands Crisis, the Quemoy-Matsu Crisis, and the 1955 Taiwan Strait Crisis) was a brief armed conflict between the People's Republic of China (PRC) and the Republic of China (ROC) focused on several ROC-held islands a few miles from the Chinese mainland in the Taiwan Strait. The crisis began when the PRC initiated heavy bombardment of Kinmen (Quemoy) island in September 1954.

Source: Wikipedia — First Taiwan Strait Crisis (CC BY-SA 4.0)