RailsOfWar-1.12.2-1901-4o is a release file of the Minecraft mod Rails of War, made for Minecraft 1.12.2. It was published on January 7, 2019 and is 4 MB in size. For the full description, screenshots and every other version, visit the Rails of War mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.