附属国

A subject is a country which is subordinate to another country (the overlord). All subject types become a junior member of the overlord's customs union.

Most subject types must be a lower rank than their overlord, and no subject type can ever be a great power. For example, East India Company is a major power at the start of the game despite having more prestige than United States of America, a great power, because they are a subject of Great Britain, also a great power.

Additionally, subjects have other restrictions or obligations, varying by type, such as paying a portion of their tax income to the overlord, being unable to start their own diplomatic plays, or being forced to join their overlord's diplomatic plays. However, they also receive a degree of protection, as the overlord is automatically called into diplomatic plays targeting the subject. However, subjects are not protected by their overlord if they join a diplomatic play targeting another country.

A subject is not immune to diplomatic plays from their overlord, however; notably, some types of subjects can be fully annexed through a diplomatic play.

Subject types

There are six types of proper subjects, and one pseudo-subject type, the Customs Union member. Three of the proper subject types are non-autonomous, meaning they are unable to start or join any diplomatic plays, except for independence, and they automatically join their overlord's diplomatic plays. The other types, including Customs Union, are autonomous, meaning they may start or join diplomatic plays as normal, do not automatically join their overlord's diplomatic plays, and may have their own subjects.

类型	改变国旗	使用宗主地图颜色	与宗主共用领导人	可自行发起博弈	如未受保护则断绝关系	强制加入宗主战争	拥有自己的附属国	可通过博弈吞并	可通过成立国家吞并	为宗主提供威望	恭顺宗主	收入上缴比例	商船贡献	宗主类型	可用于被释放国家
保护国												—	50%	受认可国家
自治领				25%	75%	受认可国家
傀儡国				30%	75%	受认可国家
朝贡国				20%	50%	未受认可国家
附庸国				30%	50%	未受认可国家
共主邦联				—	50%	任意

Aside from personal unions, all above types of subject can be created through diplomatic plays. In addition, protectorates and tributaries can be established by a diplomatic action, with either country proposing. Puppets or vassals can also be created by releasing a country from owned states.

Personal unions are the only subject that share the same ruler with its overlord. Additionally, a personal union junior can be the same rank as, or even higher than, the overlord, though this is unlikely in regular gameplay. It is not possible to form a personal union during the game, though they can be transferred from one monarchy to another through a diplomatic play. Personal union ends if the senior partner becomes a non-monarchy. The only instances are present at the start of the game. Personal unions that exist in the game are:

• Denmark-Holstein
• Denmark-Schleswig
• Great Britain-Hanover – ends with the death of King William
• Netherlands-Luxembourg
• Russia-Finland
• Sweden-Norway

Customs union

While defined as a subject type, a customs union is not a proper subject type. The senior partner is not obligated to protect its junior partners. However, like proper subject types, a junior partner of a customs union cannot become a great power, and it contributes 50% of its convoys to the senior partner.

References

Victoria 3\game\common\subject_types00_subject_types.txt

Victoria 3\game\common/diplomatic_actions

Victoria 3\game\common/diplomatic_plays

Dev Diary 20

附属类型Victoria 3\game\common\subject_types00_subject_types.txt

类型	改换国旗	宗主图色	宗主领袖	变身可吞	自发博弈	不保则断	加入宗主国战争	自有属国	宗主国须高级	宗主政体	释放可用	宗主获威望	恭顺于宗主	贡献船队
保护国														0.5