Alma 51:17

And it came to pass that Moroni commanded that his army should go against those king-men, to pull down their pride and their nobility, and level them with the earth, or they should take up arms and support the cause of liberty.

Moroni told his army to go against those king-men. They would bring down their pride. They had to pick up weapons and support freedom or be destroyed.

Moroni ordered his army to march against the king-men. They would crush their pride and their aristocratic arrogance, or the king-men would take up arms and fight for liberty.