Republic of China Navy in the context of "People's Liberation Army Navy"

The Republic of China Armed Forces (Chinese: 中華民國國軍; pinyin: Zhōnghuá Mínguó Guójūn; lit. 'Republic of China National Military') are the national military forces of the Republic of China (ROC), which is now based primarily in the Taiwan Area but formerly governed Mainland China prior to 1949. The armed forces comprise the Army, Navy (including the Marine Corps), Air Force, and Military Police Force. The military operates under the civilian control of the Ministry of National Defense, a cabinet-level body overseen by the Legislative Yuan.

Formerly known as the National Revolutionary Army (NRA), it was renamed the Republic of China Armed Forces in 1947 due to the implementation of the newly promulgated Constitution of the Republic of China. It was also historically referred to as the Chinese National Armed Forces (CNAF) prior to the establishment of the People's Republic of China on the Chinese mainland and the gradual loss of international recognition in the 1970s by the United Nations and many countries, including the ROC's close ally, the United States.

The naval history of China dates back thousands of years, with archives existing since the late Spring and Autumn period regarding the Chinese navy and the various ship types employed in wars. The Ming dynasty of China was the leading global maritime power between 1400 and 1433, when Chinese shipbuilders built massive ocean-going junks and the Chinese imperial court launched seven maritime voyages. In modern times, the current People's Republic of China and the Republic of China governments continue to maintain standing navies through the People's Liberation Army Navy and the Republic of China Navy, respectively.

Tench-class submarines were a type of submarine built for the United States Navy (USN) between 1944 and 1951. They were an improvement over the Gato and Balao classes, only about 35 to 40 tons larger, but more strongly built and with a slightly improved internal layout. One of the ballast tanks was converted to carry fuel, increasing range from 11,000 nautical miles (20,000 km; 13,000 mi) to 16,000 nautical miles (30,000 km; 18,000 mi). This improvement was also made on some boats of the previous two classes. Further improvements were made beginning with SS-435, which are sometimes referred to as the Corsair class. Initial plans called for 80 to be built, but 51 were cancelled in 1944 and 1945 when it became apparent that they would not be needed to defeat Japan. The remaining 29 were commissioned between October 1944 (Tench) and February 1951 (Grenadier). The last submarine of the Tench class, as well as the last submarine which served during World War II, remaining in service with the U.S. Navy was USS Tigrone (AGSS-419) which was decommissioned on 27 June 1975.

One Tench-class submarine is reportedly still in active service, USS Cutlass (hull number SS-473), which was transferred to the Republic of China Navy in 1973. ROCS Hai Shih (S 791) is expected to remain in service until 2026, 82 years after she was first launched in 1944.

The Republic of China Marine Corps (ROCMC; Chinese: 中華民國海軍陸戰隊; pinyin: Zhōnghuá Mínguó Hǎijūn lù zhàn duì), commonly known as the National Military Marine Corps (Chinese: 國軍海軍陸戰隊; pinyin: Guójūn Hǎijūn lù zhàn duì), is the amphibious arm of the Republic of China Navy (ROCN) responsible for amphibious warfare, counter-landing and reinforcement of the areas under the jurisdiction of the Republic of China (ROC), including the island of Taiwan, Kinmen, and the Matsu Islands, and defense of ROCN facilities, also functioning as a rapid reaction force and a strategic reserve capable of amphibious assaults.

Established in 1947 on mainland China, the ROCMC is considered the most selective branch within the ROC Armed Forces. The ROC Marines have gained much publicity for the "Road to Heaven" phase of one of their training courses which is the final phase of the 10-week long selection program for their special forces, the Amphibious Reconnaissance and Patrol Unit.