There are two ways to lose puppets:
1) A revolution which occurs when a rebel group controls the puppet's capital for a year.
2) A foreign nation puts the puppet in their sphere, which can then have an event that breaks them out of your vassalage.
1) A revolution which occurs when a rebel group controls the puppet's capital for a year.
2) A foreign nation puts the puppet in their sphere, which can then have an event that breaks them out of your vassalage.