In [[HOD]], the overlord can take control of the puppet's troops.
[[China ]] starts with its own special kind of satellites called substates. They act as very loyal puppets as long as China is an [[uncivilized nation]] and will be inherited after China [[Westernization|westernizes]]. They do not join wars that China enters as an ally, but provide military access to both sides. E.g. if Japan attacks Korea, China will answer the call to arms but Manchuria will not join; both sides can move troops through Manchuria.
If a satellite becomes a [[Great Power]] it automatically breaks free of the mother country. A succesful revolt in either the liege or the puppet nation will also make the country free.