Green Earth is one of the five main factions in the Wars World and a major/false antagonist in the first Advance Wars game. They are initially presented as being the main antagonists, but it is later revealed they were deceived into attacking Orange Star by Black Hole and Clone Andy.
They are initially tricked into fighting Orange Star by Clone Andy, who impersonated the real Andy and led a fake Orange Star attack on Green Earth, causing them to declare war on Orange Star in retaliation to Orange Star's alleged aggression. However, after Clone Andy is revealed, Green Earth joins the other Wars World nations in stopping Black Hole.
In Advance Wars 2, they get invaded by Black Hole, but luckily, Eagle, Drake and Jess are able to turn the tide of the war and push the Black Hole forces back.
Advance Wars: Days of Ruin