Moroni, Teancum, and Lehi worked together, each in his own way, and thus they were able to retake the city of Mulek. They held a council of war. Moroni was the strategist, Teancum would be the decoy, and Lehi would be the backup, then Moroni would go into the city. It worked because each did their part. The leaders were all united. Note the camaraderie between these three leaders who loved each other. In war, it is often said, soldiers do not die for their country, but for their friends.