In 2019, the Republic of Croatia signed the Declaration on European Quantum Communication Infrastructure (EuroQCI) with the intention of participating in the construction of infrastructure for secure quantum communications that will cover the entire European Union. The CroQCI consortium was formed with the goal of implementing a national quantum network based on quantum communications. This includes the development and testing of an experimental system and network that combines the best of quantum, post-quantum classical, and quantum-enhanced solutions. The CroQCI project is going to test network architectures and enable terrestrial infrastructure with a future space component to achieve a fully functional quantum network.