Unrestricted Submarine Warfare Idea ID
The add_ideas ID for Unrestricted Submarine Warfare in Hearts of Iron IV is USA_unrestricted_submarine_warfare.
Unrestricted Submarine Warfare
country
Add this idea with the add_ideas command and the idea ID USA_unrestricted_submarine_warfare.
About this idea
History has shown that whatever well-intentioned treaty tried to control submarine warfare is not worth the paper it is written on. We should not consider ourselves bound by something our enemies will ignore anyway.