Global Defense Initiative

The Global Defense Initiative, or GDI is one of the two main factions in the Tiberium series of games of the Command and Conquer franchise. In the Tiberium universe, GDI is a military junta acting as the de facto government of planet Earth on behalf of the United Nations. It tasked itself with controlling the spread of Tiberium, a valuable but toxic alien mineral, and defeating the Brotherhood of Nod, which it deems a terrorist organization.