Jul 8, 2025

U.S. Marine Corps 1st Lt. Arron Ku, a field artillery officer with Kilo Battery, 3rd Battalion, 11th Marine Regiment, Marine Rotational Force – Darwin 25.3, swims and holds his M4 carbine above water as part of True Grit during jungle warfare training at the Combat Training Centre in Tully, Australia, June 26, 2025. True Grit is the culminating event for the Marines, designed to assess lethality in a jungle environment, further develop interoperability with the Australian Defence Force, and increase readiness for various operations in the Indo-Pacific region. MRF-D is an annual six-month rotational deployment to enhance interoperability with the Australian Defence Force and allies and partners and provide a forward postured crisis response force in the Indo-Pacific. Ku is a native of California. (U.S. Marine Corps photo by Cpl. Angelina Sara)

CAMERA

Canon EOS R5

LENS

RF28-70mm F2 L USM

APERTURE

2

SHUTTERSPEED

1/500

ISO

100

IMAGE IS PUBLIC DOMAIN

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This photograph is considered public domain and has been cleared for release. If you would like to republish please give the photographer appropriate credit. Further, any commercial or non-commercial use of this photograph or any other DoD image must be made in compliance with guidance found at https://www.dimoc.mil/resources/limitations, which pertains to intellectual property restrictions (e.g., copyright and trademark, including the use of official emblems, insignia, names and slogans), warnings regarding use of images of identifiable personnel, appearance of endorsement, and related matters.

CAMERA

Canon EOS R5

LENS

RF28-70mm F2 L USM

APERTURE

2

SHUTTERSPEED

1/500

ISO

100

 
I Marine Expeditionary Force