Terra Firma

Earth is the primary planet home to many of the nations of Tychrome, being the stage for many wars in the 1st Continuity, and the home to an alien landing and several wars in the 2nd Continuity. It is called Terra Firma by the Cyaanians, as a nod to the 1st Continuity's colony of Terra, as well as a reference to the Daniel X books by James Patterson, and is called Eurf by the Soloconians as a mispronunciation by the alien visitors from Solocon, but is only called this in the 2nd Continuity.

Nations With Roots in Earth
Several nations started in Earth, and many do not even go to planets other than Earth.

Nations With Roots On Earth Nations That Have Not Left Earth Nations With No Ties to Earth
 * Cyaania
 * Precusor
 * Union of Wydran Confederations (former)
 * Silence Cormerei
 * Dvinglus
 * The Ancient World
 * Faliss
 * Hvengal
 * Zach America
 * Our Futuer / The McDoogleberry Isles
 * Kelvaros Prime
 * Solocon
 * A Single Tiny Blip In A Massive Universe

Geography
The only known landmasses of Earth are Tychrome itself, and though North America and Asia are occasionally mentioned, they are never actually seen in any Roleplay. Tychrome becomes more icy as you go north, however this rule is broken by Tyhcoon in the 1st Continuity, where Tyhcoon is in the northern part of the continent, but is a warm grassland. This is generally assumed to be because of a terraforming device manipulating the environment.