In the battle of Julu, Xiang Yu often said the above sentence, "Burn your bridges, or you will die if you don't break."
From where? "Historical Records of Xiang Yu's Biography": "When Xiang Yu learned that he led his troops to cross the river, they all sank, broke the cauldron, burned the house, and gave three meals to show that his soldiers would die, and there was no return."
Xiang Yu led his troops across the Yellow River, sank the boat into the river, smashed the cooking pot, burned down his residence, and brought only three days' dry food to show that he would die and never come back.
Extended data:
After all the Chu troops crossed the Zhanghe River, Xiang Yu gave the soldiers a full meal, each with three days' dry food. Then he ordered: the boat crossing the river (called boat in ancient times) was sunk into the river, the boiling pot (called kettle in ancient times) was smashed to pieces, and the nearby houses were set on fire. It's called cross the rubicon.
After that, Xiang Yu immediately led all the Chu troops across the river, each carrying three days' rations to show the heart of death. The Chu army fought bravely to the death, winning nine wars and defeating Zhang Hanjun.
Qi, Yan and other reinforcements also rushed out of the camp to help, captured Wang Li alive, killed his lieutenant, and solved the siege of Julu. Since then, all anti-Qin generals have worked for Xiang Yu. Zhang Han stuck to his spine Yuan, confronted Xiang Yu, and sent Sima Xin to ask for help.
Xiang Yu sent Pu, a general, to cross Sanhujin (Guzhangshui Ferry, now southwest of Zi County, Hebei Province) day and night, cut off his way home and led the main force to defeat him. Desperate Zhang Han led 200,000 troops to surrender. Qin Jun's main force was destroyed.
References:
Baidu encyclopedia-cross the rubicon