It's a matter of leverage

'Isn't the intensity of the fire… decreasing?'

When I received Makary's urgent summons, I wasn't exactly sure what could be the problem. 

While on my way to the dugout where he positioned himself, I tried to analyze every possible scenario. From Princess Etaria deciding to go against the taboo and engage in the battle while ignoring the consequences of doing so, her trying to influence events without any direct involvement, all the way to the humans of this world proving a lot more resilient to the firearms than expected, their ability to raise shields ending up sufficient to block the shoots…

But as I got closer to the area where the slaughter was actually taking place, I had no other choice but to realize that things were actually far simpler. 

'They are running out of ammo… already?'