Clint Eastwood has said he will make two films about the World War II battle of Iwo Jima.
Eastwood is adapting best-selling book Flags of Our Fathers
The Oscar-winning director is making two films about the battle - one from the side of the US marines and the other from the Japanese side.
The films - Flags, and the tentatively named Lambs Before the Wind - will be released simultaneously next year.
The battle for the island of Iwo Jima, in 1945, left 21,000 Japanese and 6,800 US soldiers dead in a single month.
Eastwood, who won his second best director Oscar this year for Million Dollar Baby, told Time magazine he had difficulty explaining why he took on the project.
"I don't know - sometimes you just get a feeling about something," he said.
"You have a premonition that you can get something decent out of it."
The Iwo Jima Memorial in Virginia commemorates the battle
Mount Suribachi on Iwo Jima's southern tip was the peak where six US serviceman raised a US flag in February 1945, a moment captured in one of the most iconic images of the war.
Many of the Japanese soldiers who died on the island, 1,200 kilometres south of Tokyo, remain unaccounted for more than half a century later.
Million Dollar Baby also won this year's best picture Oscar. Eastwood was nominated for the best actor prize for his performance in the film.
He was nominated for best picture and best director for Mystic River in 2004, having previously won the best director and best picture Oscars for Unforgiven in 1993, when he also picked up a best actor nomination.