What American strength did yamaoto hope to weaken in attacking midway?

Admiral Isoroku Yamamoto aimed to weaken American naval strength and morale by attacking Midway. He believed that a decisive victory at Midway would inflict significant losses on the U.S. Pacific Fleet, thereby diminishing American resolve and capability to respond in the Pacific theater. By crippling the U.S. forces, he hoped to shift the balance of power in favor of Japan.