The method used by the Huarong Empire was extremely extreme. It was only after this war ended that the Langmu Empire discovered what the Huarong Empire had done. They used the simplest and yet hardest method - blowing up mountains.
Under the leadership of Prince Rong, hundreds of Fire Attribute Mages launched a massive bombardment at the thinnest part of the Tianlang Mountain Range with extraordinarily powerful Fire Magic. Particularly, the Forbidden Curse personally activated by Prince Rong, in just one day, shockingly, flattened three mountains over three hundred feet high. It forcibly carved out a hundred feet wide path in the middle of the Tianlang Mountain Range. Through this path, the Light Cavalry Army led by Prince Rong directly invaded the interior of the Langmu Plains.