Are all Starbucks stores company stores or are some franchises. What happens th

Are all Starbucks stores company stores or are some franchises. What happens then in terms of unionization? How much independence do they have. What does this mean? This is not a paper on the different forms of ownership but on the unionization of Starbucks and the problems from both ownership and labor as well as the impact on the corporate ownership. DO NOT make this about the different forms of ownership.
Look at the fight from both sides. Tell me where it stands now and what you would do to combat unionizing from the management side or push it from labor.