Leon never had any military training; the only thing he knew about the war was what he saw in movies. However, when he reached the central plaza, the only way he could describe what he was seeing was using the word war. A horde of never-ending monsters was wiping out the few survivors that were still alive. Leon saw several arrows of light flying and making demons disintegrate, but soon the arrows stopped. Amanda was an archer who uses mana, but she didn't have enough mana to stop so many demons.
To make things a bit more efficient, Leon created his steel spears. Without running out of mana, he could only control six, but it was better than nothing. He killed the monsters and demons which were trying to surround the survivors in the central plaza and opened a path for him to reach them. Carrying the golden shield was a pain, so he had to lend that to someone.