Joe Rosenthal, 1945. Six US Marines raising the flag on Mt Suribachi. Pulitzer Prize 1945.
From Wikipedia
Raising the Flag on Iwo Jima is an iconic photograph of six United States Marines raising the U.S. flag atop Mount Suribachi during the Battle of Iwo Jima in the final stages of the Pacific War. Taken by Joe Rosenthal of the Associated Press on February 23, 1945, the photograph was published in Sunday newspapers two days later and reprinted in thousands of publications. It won the 1945 Pulitzer Prize for Photography and has come to be regarded in the United States as one of the most recognizable images of World War II.