The docuseries embeds with the 31st Marine Expeditionary Unit, revealing the unrelenting pace of drills, exercises, and real-world prep alongside the quieter moments that hold the unit together. Across four parts, the series follows young Marines as they forge tight bonds, find their footing as leaders, and balance duty with the pull of home while patrolling foreign seas.

Directed by Chelsea Yarnell, Marines is produced by Amblin Documentaries and Lucky 8 TV. Executive producers are Darryl Frank, Justin Falvey, Sebastian Junger, Kimberly Woodard, Greg Henry, Isaac Holub, and George Kralovansky, with Katie Goldstein and Arielle Kilker serving as co‑executive producers.