Yi's success had forced the Japanese to give up offensive naval operations, but their huge fleet remained entrenched in Busan harbor. While Yi pinned them down, reinforcements from the Chinese army had finally arrived and helped the Korean army take back the country on land. Yi petitioned for marines to take Busan back from the Japanese, but his requests were ignored. Instead, he focused on making his base on Hansando self-sufficient: he promised protection to refugees in exchange for them working the island, building his equipment, and even researching military technology. But a truce was called with Japan, one that dragged on for years until Hideyoshi broke it by ordering a second invasion. An informant brought word of secret, unprotected Japanese fleet movements, but Yi recognized it as a trap and refused to go. However, his friend Ryu's enemies at court seized on this as an opportunity to put Yi on trial for treason. They demoted him again, and gave his fleet to Won Kyon. Won Kyon fell into the trap Yi had refused, and a coordinated surprise attack from the Japanese resulted in the destruction of all but 12 ships. Yi was quickly re-instated, but ordered to disband the navy. He refused, and planned his counterattack carefully: he would fight at Myeongnyang Strait, where he hoped the natural currents would do what his numbers could not. His plan worked: the reversing tide caught the Japanese by surprise and flung their ships against each other right as he pressed the attack. With 13 ships versus 133, he once again drove back Japan with zero losses to his own navy. Word of his success brought other ships out of hiding and convinced the Chinese navy to ally with him at last.