The day after the Battle of Sacheon, Admiral Yi Sun-shin had his fleet rested in the open sea off Saryang where they would have tactical advantage were the Japanese to execute a counterattack. Admiral Yi once again summoned his resting fleet to arms the morning of June 2nd when he received a report that 21 Japanese ships were docked at the harbor of Dangpo. As the Korean fleet approached the Dangpo harbor, Yi Sun-shin noticed that the flagship of the Japanese fleet was one of the 21 ships anchored in the harbor. Realizing the golden opportunity, Admiral Yi lead the assault with his own flagship (a turtleship) targeting the Japanese flagship. The sturdy construction of his turteship allowed Yi Sun-shin to easily ram through the line of Japanese ships and position his ship right alongside the anchored Japanese flagship. The light construction of the Japanese ship was no match for a full broadside assault and was left sinking in minutes. Having been hit by a Korean arrow, the Japanese admiral aboard the flagship fell into the sea. Soldiers aboard another Korean ship pulled him out of the water and beheaded him. The naval campaigns conducted by Korean Admiral Yi Sun-shin during the Imjin War against the Japanese forces of Toyotomi Hideyoshi. ... The Battle of Sacheon was a naval battle in the first phase of the Seven-Year War between Korea and Japan. ... The Battle of Sacheon was a naval battle in the first phase of the Seven-Year War between Korea and Japan. ... Yi Sun-sin (April 18, 1545 — December 16, 1598), was a famous Korean naval leader. ... The Turtle Ship, which is also known as Kobukson or Geobukseon (거북선), is a galley that was invented in the 15th century. ...

The Japanese soldiers panicked upon seeing the beheading of their admiral and were slaughtered by the Koreans in their confusion. Admiral Yi ordered a landing party to destroy the enemy base on the beach, but once again was forced to recall his order when he heard reports that at least 20 ships were bearing down on them from Koje-do. Wishing to give his fleet the greatest tactical advantage possible, he ordered his ships to sail out of the bay and into the open sea. The battle would not continue on this day however, as the Japanese ships made a hasty retreat into the descending darkness upon seeing the intimidating Korean fleet. Geoje is a city located in South Gyeongsang province, just off the coast of the port city of Busan, South Korea. ...