Question: What Japanese unit was commanded by the admiral targeted by Operation Vengeance?
Sentence (from "Isoroku Yamamoto"): Isoroku Yamamoto (山本 五十六 , Yamamoto Isoroku , April 4, 1884 – April 18, 1943) was a Japanese Marshal Admiral of the Navy and the commander-in-chief of the Combined Fleet during World War II until his death.
Relevant evidence: Yes