The Global Defense Initiative (GDI) is a fictional organization from the popular video game series Command & Conquer. It represents a coalition of nations working together to combat global threats, particularly from the Brotherhood of Nod, a militant group with a mysterious agenda. The GDI focuses on maintaining peace and stability through advanced technology and military strength. In the game, players can control the GDI to engage in strategic battles, utilizing various units and resources. The organization emphasizes teamwork and cooperation among its members, showcasing the importance of unity in facing challenges. The GDI's mission highlights themes of heroism and the fight against tyranny.