Truk’s commanders, including Lt. Gen. Mugikura Shunzaburō, surrender aboard USS Portland; navy units record a ceasefire.
What happened
The surrender took place on the same day as the main ceremony in Tokyo Bay. Japan’s delegation on the Portland included Vice Adm. Chūichi Hara of the 4th Fleet, Lt. Gen. Mugikura Shunzaburō of the 31st Army, and Rear Adm. Aritaka Aihara, head of the Eastern Branch of the South Seas Government.
Why it matters
It ended about three decades of Japanese rule in Chuuk.
Related image
Not a photograph of this event itself; the caption says what it shows.

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A heavily bombed airfield at Truk (Chuuk), photographed from a US Navy plane on 26 August 1945, after the Pacific War cease-fire and before Truk’s formal surrender on 2 September 1945. The Navy’s caption notes wrecked Japanese Navy aircraft on its seaplane ramp.
US Navy photograph 80-G-490381, National Archives, via the Naval Historical Center Online Library (HyperWar mirror).
Public domain (US Navy photograph, 17 U.S.C. § 105) Source record