Watch Isoroku Yamamoto, the Commander-in-Chief of the Combined Fleet (2011) : Full Movie Online Free Admiral Isoroku Yamamoto (1884-1943) was the Japanese Naval commander who was given the order to attack Pearl Harbour, an order he was duty bound to obey which went against his own personal beliefs. While this infamous attack is a low point in Japanese and US history it wouldn’t have happened if the Japanese government had listened to Yamamoto in 1939 and searched for a more peaceful way to end their war campaign, proving his many ominous presages of the outcomes of the attack to come true.