At the junction of Wyoming, Montana, and Idaho in the United States, within Yellowstone National Park in the Rocky Mountains—known as the "backbone of America"—lay the steep canyon called the Grand Canyon of the Yellowstone, roughly thirty-eight kilometers long.
Between the sheer cliffs rising on both sides, American wizards had set up all kinds of defensive works above places such as the mighty upper and lower falls of the Yellowstone River. Ever since MACUSA had been burned down, America's armed forces had broken into smaller units and scattered across multiple locations in these mountains, nervously making preparations.
In particular, they had set up Anti-Apparition magic to curb the teleportation ability of Floating Ships. At the same time, with the help of the mountains' complex terrain, the wizards had cleverly designed anti-air traps targeting the largest Sailing Ships of the Line Warships that the wealthy Floating City had built in the earlier wars against Germany and Bulgaria, while America itself had spent this period gathering mainly small and medium-sized Warships, which were more flexible in this kind of mountain warfare.
This military defense was an important part of Leonard's plan, and all of MACUSA's previous actions had also unfolded step by step exactly as Leonard had planned. This gave the American public, who had learned the contents of Leonard's speech through all kinds of media and magazines across the country, even greater confidence in resisting the war.
First, Leonard had flown into a rage and issued that deeply satisfying, rousing declaration, exposing Britain's dark ambitions and greedy face. Then they had successfully occupied the United Magical Kingdom's colonies. This victory further gave people confidence, because it shattered the impression in their minds that the Harrises had been constantly successful in recent years. And some countries that were relatively hostile to the