This story takes place on a fictional version of Earth, where World War III erupted at the dawn of the 21st century. The conflict raged for years, consuming nations in fire and ruin, until seven pacifist countries—united in their refusal to surrender to chaos—finally brokered peace.
The United Nations, unable to directly intervene during the war due to its lack of military strength and the fact that most Security Council members were combatants, realized that diplomacy alone was no longer enough. To prevent another global catastrophe—no matter the cost—they created a new, independent military force.
Thus, the Seven Nation Army was born, composed solely of the seven nations that had stood for peace: Japan, Bangladesh, Russia, England, Iran, Argentina, and Italy. Their single mission was clear—stop the next great war before it begins.