page_title: Republic of Korea Navy
section_title: Origins
hierarchical_section_title: Republic of Korea Navy / History / Origins
context_page_description: The Republic of Korea Navy, also known as the ROK Navy or South Korean navy, is the naval warfare service branch of the South Korean armed forces, responsible for naval and amphibious operations. The ROK Navy includes the Republic of Korea Marine Corps, which functions as a branch of the Navy. The ROK Navy has about 70,000 regular personnel including 29,000 Republic of Korea Marines. There are about 150 commissioned ships with the ROK Navy. The naval aviation force consists of about 70 fixed-wing and rotary-wing aircraft. The ROK Marine Corps has about 300 tracked vehicles including assault amphibious vehicles.
  The Republic of Korea Navy was established as the Marine Defense Group on November 11, 1945 after Korea was liberated from the Empire of Japan on August 15, 1945. Since the Korean War, the South Korean navy had concentrated its efforts on building naval forces to counteract hostilities of North Korea. As South Korea's economy grew, the ROK Navy was able to locally build larger and better equipped fleets to deter aggression, to protect the sea lines of communication, and to support the nation's foreign policy.
context_section_description: Korea has a long history of naval activity. In the late 4th century during the Three Kingdoms Period, Goguryeo defeated Baekje, fielding amphibious forces of 40,000 men in the process. In 732, the Balhae navy "attacked the Shandong peninsula and destroyed the biggest seaport of the Tang Empire in the east – Dengzhou." In the 9th century, Commissioner Chang Bogo of Unified Silla established a maritime base called Cheonghaejin on an island to foster trading with China and Japan, and to eradicate pirates.
  In 1380, naval forces of the Goryeo Dynasty defeated 500 invading Japanese pirate vessels by deploying shipboard guns, devised by Choi Moosun. This is reportedly the first use of shipboard guns in naval history.  In 1389 and 1419, Korean naval forces invaded Tsushima Island to suppress Japanese piracy. In the early years of the Joseon Dynasty, the naval force reached its peak of 50,000 personnel, in order to combat the ongoing piracy issue.
  During the Japanese invasions of Korea (the Imjin War) in the 16th century, the Korean naval force commanded by Admiral Yi Sunshin, who later became the head of the navy, cut off the invaders' naval lifeline and defeated the Japanese fleet, reversing the war in favor of Joseon. Admiral Yi is also credited with the creation of the Turtle Ship.
  By the end of the 19th century, the Joseon navy had no significant naval force other than coastal defense fortresses. In 1893, the Joseon court requested the British Consul-General to dispatch a naval officer for organizing a naval school in an attempt to modernize the navy. In September 1893, the navy school was established in Ganghwa Island. Lieutenant William H. Callwell, a retired British naval officer, and John W. Curtis, a gunnery instructor, served as instructors for 160 cadets and sailor recruits. However, the Royal Naval Academy was closed in November 1894, and the Joseon navy was brought to an end in 1895 due to the First Sino-Japanese War and the Gabo Reform. In 1903, the government of the Korean Empire purchased its first modern naval ship, KIS Yangmu. Korean naval tradition was disrupted after Korea was annexed by the Empire of Japan in 1910. During the Japanese occupation of Korea, the Imperial Japanese Navy (IJN) built a considerable naval base – Chinkai Guard District in southern Korea (at present-day Jinhae).
caption: Early 15th century Korean turtle ship in an illustration dating to 1795[12]
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