Similar to ヴィロヴィティツァ＝カルロヴァツ＝カルロバグ線

The empire on which the sun never sets

Multilateralism

Regional power

Neutral zone (territorial entity)

Scramble for China

Superpower

Empire

Personal union

Congress of Troppau

Hegemony

Barbary corsairs

Hague Peace Conference

Demilitarized zone

League of Armed Neutrality

Unequal treaties

Peru–Bolivian Confederation

Protectorate

Concert of Europe

European balance of power

United Nations Relief and Rehabilitation Administration

Democracy in Europe Movement 2025

Volt Europa

Suffragette