The Global Defense Initiative (commonly reffered to as GDI) are the peacekeeping military organization in the Command & Conquer series. They are the enemies of the Brotherhood of Nod and are determined to eradicate the alien resource known as Tiberium. GDI is known for their superior ground force(Their basic and advanced land units such as medium and mammoth tanks are better than their rivals) and good technology. After 4 Tiberium wars GDI now not only defeat the Brotherhood of Nod but also cleanse the Earth of Tiberium and help rebuild mankind from the previous wars.