Luna growled in pain as the leading tanks pressed up against the shield. Stopping the bombs they were throwing was one thing, but to try and resist that much weight and pressure being placed on the shield was simply not possible. Unicorns around her were dropping to their knees as they tried to give their all to stop the shield from collapsing. It was a pointless effort, and after mere seconds the shield broke, allowing the tanks to reach the wall. It also allowed them to fire over them.