The Western Continent War was the first large-scale conflict on Zi after the Grand Catastrophe meteor event. Serving as the main storyline for the NJR release, the Western Continent War's belligerents were the Helic Republic (under President Louise Camford) and the Guylos Empire (under Gunther Prozen). The war lasted from August ZAC 2099 until October ZAC 2100. Like its namesake implies, the war took place on the Western Continent of Europa. The Western Continent War is one of the most important conflicts of post-meteor Zi, as it is responsible for technological developments such as the Organoid System and the flashpoint for later wars such as the Neo-Zenebas coup of ZAC 2101.