Answer:
Provides economic benefits
The unified countries share military responsibilities.
Step-by-step explanation:
The European Union provides different excellent benefits to the countries that are allied or are part of the EU, one of the most important of those is the pacific period that has brought upon Europe and surrounding countries, the smaller countries have enjoyed a large period of union and peace by sharing military resonsibilities among them, that has helped the period of peace, and ir has economic benefits, for the other options, like working wherever they want, that is not possible in many situation.