Possible Clues:

• "Flags of Our Fathers" setting
• Islanders here regularly view local clothing James reduced
• Literally, 'sulfur island'
• WWII flag-raising site
• Site of an iconic flag-raising photo
• Setting of a famous flag-raising photo
• Japanese atoll, the scene of fierce fighting in 1945
• Geography (vi): Japanese island battle of 1945
• John Wayne war film locale
• Site of a 1945 Allied victory in the Pacific