As the name implies, the intercontinental war spans multiple continents. The Republic chase the Empire on the Dark Continent of Nyx, only to be confronted by new Zoids and technology that proved to be far superior to anything in the war until that point.
At the climax of the intercontinental war, the most powerful Zoids ever made were fielded.
However, these Zoids did not meet in their final confrontation. Instead, a natural Catastrophe happens and destroys all forces involved.