The production team behind “1917” went to great lengths to create an immersive experience.

A new behind-the-scenes feature reveals how “1917” was filmed to look like a “one-shot movie.” The entire film will play out as one take from beginning to end.

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“The first World War starts with literally horses and carriages and ends with tanks,” director Sam Mendes said. “So it’s the moment where modern war, you can argue, begins.”

“From the very beginning, I thought this movie should be told in real-time,” Mendes continued. “Every step of the journey, breathing every breath with these men felt integral, and there is no better way to tell this story than with one continuous shot.”

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The film focuses on two young British soldiers played by George MacKay and Dean-Charles Chapman. The duo is tasked with crossing enemy territory and delivering a message to prevent a deadly assault.

“1917” premieres in limited release on Christmas Day before its wide release on Jan. 10.