‘1917’ is going to be the coolest World War I movie ever

After a century, World War I is finally getting the treatment in American cinema it so richly deserves. While some of the best war movies were World War I movies, Paths of Glory, All Quiet on the Western Front, and Lawrence of Arabia, there were also many misses. What's surprising is that there are relatively few WWI movies, when compared to those depicting other wars.

No longer. 1917 is a new movie based on the Great War, coming in December. And it looks like it could be the definitive WWI movie.

The film takes place during the Third Battle of Ypres, where a British contingent of 1,600 men is due to walk into a German trap. Two Tommies are given the assignment to proceed on foot to warn the unit about their orders – the ones that take them directly into an ambush. Their mission takes them across the Ypres battlefields and through the deadly trench warfare that is now synonymous with the Great War.

What's more remarkable about 1917 is that it's based on a true story, one told to director Sam Mendes by his own grandfather, Alfred. Alfred Mendes received the Military Medal for "acts of gallantry and devotion to duty under fire" during the war. The Military Medal was replaced by the Military Cross in the UK armed forces in 1993, and would be the fifth-highest medal awarded by the United Kingdom today.

Relentless rain, mud, and death marked the Battle of Ypres.

The elder Mendes ran through snipers, trenches, moving artillery barrages, and machine-gun fire to deliver messages for two full days during the Battle of Poelcappelle. Mendes' grandfather was raised on the Caribbean island of Trinidad but left to join the fight against Germany, joining the British Army in 1916, at the age of 19. He saw action at the WWI Battles of Passchendaele (Ypres) and Poelcappelle. He was sent to go find survivors of a failed attack during Poelcappelle. It was a dangerous assignment, one his commander said he might not return from.

Despite encountering all of World War I's signature death traps, he still managed to find survivors while surviving himself. He made it back to his company's shell hole intact.

"In spite of the snipers, the machine-gunners and the shells, I arrived back at C Company's shell hole without a scratch but with a series of hair-raising experiences that would keep my grand and great-grandchildren enthralled for nights on end," he would later write in his autobiography.

1917 is based on Medes' experiences on this mission. The film is set to release on Dec. 25, 2019.