Art expresses many things in culture. How does this image of an American flag being placed at Iwo Jima
after the most
in infamous battle in the Pacific during WWII, use symbolism to commemorate, document,
and narrate an event in history?

The question is incomplete and the full version can be found online.

The flagpole helps structure the picture, and its diagonal back-leaning position contrasts with the movement of the soldiers, highlighting the effort they are making. None of their faces are visible, which helps convey a sense of universality. The group of soldiers seems like a whole body, representing the unity of their effort. All of them are part of the task, even the soldier at the end of the line, who despite not touching the flagpole is using his body to push the others.

Explanation:

The question refers to "Raising the Flag on Iwo Jima," by Joe Rosenthal, an iconic photograph depicting the second U.S. flag that was planted atop Mount Suribachi on Feb. 23, 1945, during the Battle of Iwo Jima.

It was this photo, as opposed to the photo of the first flag placement, taken by Staff Sgt. Louis R. Lowery, that became a symbol of the resilience of the U.S. Marines during World War II, and that was most likely due to its powerful composition.