Treaty of Richmond (Confederation of States)

Signers
The Treaty of Richmond joined the the Confederation of States, the Confederation of the Caribbean, the United Kingdom of Great Britain, Kingdom of Sweden, Republic of Ethiopia, Republic of Liberia, the Republic of Arabia, the Republic of Turkey, the Kingdom of Persia, the Islamic Repubic of Afghanistan, and the Republic of Central America in a personal union with the Confederation of States.

How the Personal Union works
The personal union with the Confederation of States basically incorperated the republics into the Confederation as states with thier current President, or Prime Minister, etc becoming that state's first governor.

But if the new incorperated territory was a Kingdom that royal family became the governors of that state while still keeping their title of King.

If the new territory was a colony the colony became a state with a reoublican government.