What was a decisive naval battle in the Pacifix Theater of WW2 that "Zuihō" played a secondary role in?
Japanese aircraft carrier Zuihō:  "Zuihō" played a secondary role in the Battle of Midway in mid-1942 and did not engage any American aircraft or ships during the battle. Battle of Midway: The Battle of Midway was a decisive naval battle in the Pacific Theater of World War II which occurred between 4 and 7 June 1942, only six months after Japan's attack on Pearl Harbor and one month after the Battle of the Coral Sea.
Battle of Midway