Soviet Focus Tree Hoi4 Mod Soviet Focus Tree Hoi4 Russia Focus Tree Hoi4 Soviet Focus Rework Soviet Union Expanded Focus Tree GUS Soviet's Puppets The Belgian Lion Roars Again The Man in the High Castle The Sickman of the Middle East The War of the Worlds ToraToraTora UMC Germany Completed UMC Japan Rise of Nations is a mod lovingly made by the Hoi4 Community, for the Hoi4 … Hoi 4 Road To 56 China How To Not Incompetent. HoI4 - The Guangxi Clique - Part 6: SPLIT IN TWO! One of HOI4's biggest mechanics is the focus tree system.