There can be many different reasons why people choose to join a revolution. Some people may be motivated by a desire for change, and see revolution as the only way to achieve it. Others may be motivated by a sense of injustice or oppression, and feel that they have no other choice but to take up arms against their rulers. Still others may be motivated by a desire for personal or group gain, such as power or wealth. Ultimately, the decision to join a revolution is a personal one, and can be influenced by a wide range of factors.