UN May–June 1951 counteroffensive

The UN May–June 1951 counteroffensive was a military operation performed by the United Nations Command (UN) during the Korean War launched in response to the Chinese spring offensive of April-May 1951. It was the final large-scale offensive of the war that saw significant territorial changes.

Source: Wikipedia — UN May–June 1951 counteroffensive (CC BY-SA 4.0)