Alan Wood, who as a 22-year-old Navy officer during World War II provided the iconic flag at Iwo Jima, has died. (Courtesy NASA/JPL-Caltech)

Alan Wood never claimed to be a hero, but he did play a supporting role in one of World War II’s most stirring moments.

It was at Iwo Jima on Feb. 23, 1945. Straining into the wind, five Marines and a Navy corpsman planted the Stars and Stripes on the rocky peak of Mount Suribachi. As the flag unfurled, Associated Press photographer Joe Rosenthal captured what may have been the war’s most iconic image, a shot that inspired monuments and made the Iwo Jima flag-raisers instantly famous.

Mr. Wood, a 22-year-old Navy officer, wasn’t among them. But it was Mr. Wood who provided the flag — a small act that would always remind him of the epic sacrifices made by so many on that desolate island 750 miles south of Tokyo.

“The fact that there were men among us who were able to face a situation like Iwo where human life is so cheap, is something to make humble those of us who were so very fortunate not to be called upon to endure any such hell,” he wrote in a 1945 letter to a Marine general who asked for details about the flag.

Mr. Wood, who went on to spend nearly five decades as a technical artist and public information officer at the Jet Propulsion Laboratory in La Canada Flintridge near Los Angeles, died April 18 at his home in Sierra Madre, Calif. He was 90 and had congestive heart failure, said his son, Steven Wood.

Mr. Wood was in charge of communications on LST-779, one of many landing ships that disgorged tanks and construction equipment on Iwo Jima’s shores.

Beached close to the base of Mount Suribachi, his ship was boarded one morning during the five-week battle by a tired Marine seeking the biggest flag that he could find.

After heavy fighting, U.S. forces had managed to scale the 500-foot peak and hoist an American flag from a length of blasted water pipe.

But top U.S. officials on the island called for a larger flag — perhaps, according to some accounts, because Secretary of the Navy James Forrestal, who was witnessing the battle, asked for the first one as a memento.

Mr. Wood gave the young Marine a 37-square-foot flag he had discovered months before in a Pearl Harbor Navy depot. That was the flag whose raising was photographed by Rosenthal in what the 1945 Pulitzer Prize committee called “a frozen flash of history.”

As for Mr. Wood, a lieutenant junior grade by the end of the war, “he didn’t talk much about it,” his son said. “He didn’t draw attention to himself. He was just there when someone needed a flag and he gave it to them.”

Over the years, others have claimed that they provided the flag, but retired Marine Col. Dave Severance, who commanded the company that took Mount Suribachi, said this week in an interview that it was Mr. Wood.

“I have a file of more than 60 people who claim to have had something to do with the flags,” he said from his home in La Jolla, Calif.

About 6,800 U.S. troops died on Iwo Jima’s eight square miles. Japanese losses were estimated at more than 20,000.

Alan Stevenson Wood was born in Pasadena on May 3, 1922. He received a bachelor’s degree in history at the University of California at Berkeley. A watercolorist, he studied at the Art Center in Pasadena before joining the Jet Propulsion Laboratory in 1958.

As a spokesman for the lab, he helped coordinate news coverage of the Mariner, Viking, Voyager and Galileo spacecraft missions.

His wife, Elizabeth, died in 1985. Survivors include his son, Steven Wood of Solana Beach, Calif.; and three grandchildren.

The flags of Iwo Jima are on rotating display at the National Museum of the Marine Corps in Triangle, Va.

—Los Angeles Times