A river in Imperialism is a blue line on the map, running from source to sea through two or more tiles. A river tile is available for the building of a port unless it is on a hill or mountain, and produces a unit of fish for the first port that is built on or adjoining. A port on a river can be blockaded at the river mouth. This article is a stub. You can help Imperialism Game Wiki by expanding it. Retrieved from "https://imperialism.fandom.com/wiki/River?oldid=4235" Categories: Article stubs Map features Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.