Add Iron Blood as a new nation to the World War II.
Starts the game in Bulgaria, an event occurs that allows you to operate Iron Blood.
The Iron Blood consists of Metal Blood from Azure Lane and Sangvis Ferri from the GirlsFrontline, and is responsible for the Navy and Army respectively.
Iron Blood has a mechanized army and does not conscription humans. The army is therefore produced by the General Headquarters, but it is so few that it must be prepared in other ways.
In addition, this nation cannot create a puppet country and cannot release the nation (sometimes a puppet country can be created due to a problem on the game side, but in that case, it will be merged immediately by the event). On the other hand, the penalties for occupation and governance can be greatly reduced.
The first branch of the national focus tree is the choice between receiving a strong bonus in the short term to take action early or gaining a long-term advantage to make careful preparations.