Alma 55:24

Now behold, this was the desire of Moroni. He took them prisoners of war, and took possesion of the city, and caused that all the prisoners should be liberated, which were Nephites; and they did join the army of Moroni, and were a great strength to his army.

This was what Moroni wanted. He took them as prisoners of war and took control of the city. He let all the prisoners who were Nephites go free. They joined Moroni’s army and made his army much stronger.

This was exactly what Moroni wanted. He took them as prisoners of war, captured the city, and freed all the Nephite captives. They joined Moroni’s army and greatly strengthened his forces.