破釜沉舟 (pò fǔ chén zhōu): lit. to break the cauldrons and sink the boats ; fig. to cut off one's means of retreat; to burn one's boats

chénzhōu

lit. to break the cauldrons and sink the boats ; fig. to cut off one's means of retreat; to burn one's boats

Xiang Yu smashed his cooking pots and sank his boats so his men could only advance. For committing past the point of retreat.