Armed conflict ripped through South America, as Koslovic, Frieden and UN forces clashed over ideological differences, sparking additional conflicts off-planet, such as the Argyre Planitia Campaign. This war brought a great deal of suffering to the people of Earth, and caused an enormous famine.
- A Soldier's Tale: Rainforest Wars was written about this event. This book is a favorite of CPO Franklin Mendez, and described as a "military classic" in Halo: Ghosts of Onyx.
- Two of Admiral Preston Cole's great-grandfathers (on his mother's side) served in the Rain Forest Wars. One did not survive. The other, Captain Oliver Franks, received the Bronze Star.
- An early timeline had the Rain Forest Wars take place in 2170. This was changed a few months later in development.