- HD 1080
- Runtime: 140m.
- Status: Released
- 1
- Languages: ko
- Country: South Korea
- Director: Hwang Dong-hyuk
- Stars: Lee Byung-hun, Kim Yun-seok, Park Hae-il, Go Soo, Park Hee-soon
- keywords: based on novel or book, based on true story, 17th century, joseon dynasty, qing dynasty, korean history, chinese invasion of korea, mountain fortress
- Production_studio: Siren Pictures
- Slogan: The fate of the nation is in their hands
- providers: Netflix, Netflix basic with Ads
- The The Fortress is featured in the top rankings of 2017
- #71 in Top Action Movies of 2017
- #24 in Top War Movies of 2017
Ancient Korea, 17th century. The powerful Khan of the Jurchen tribe of Manchuria, who fights the Ming dinasty to gain China, becomes the first ruler of the Qing dinasty and demands from King In-jo of Joseon to bow before him; but he refuses, being loyal to the Mings. On December 14th, 1636, the Qing horde invades Joseon, so King In-jo and his court shelter in the mountain fortress of Namhan and prepare to defend the kingdom.