Submarine Primacy Idea ID

The add_ideas ID for Submarine Primacy in Hearts of Iron IV is trade_interdiction_navy_spirit.

Submarine Primacy

navy_spirit

Add this idea with the add_ideas command and the idea ID trade_interdiction_navy_spirit.

While active, Submarine Primacy applies the following modifiers in Hearts of Iron IV:

Without supplies, a country cannot fight a war.