An understanding of fire behavior is an essential foundation to effectively prevent, plan for, and control fire losses. The need for a working knowledge of this important area is similar to a sports team watching films of another team they will be playing or a military tactician who studies the tactics used by his opponent. To effectively prevent a loss, we must understand what causes it. To effectively plan for losses, we must know how they occur, and, more importantly, why they occur. To control losses, we must have a grasp of the strengths and weaknesses of the enemy, in this case, fire.