This Is Us plans to really delve into Jack's Vietnam storyline

Vulture

“We’re trying to really break some barriers for network television, in terms of creating something that’s so period, and so overseas,” says co-showrunner Isaac Aptaker. “It’s a real timeline that we’re going to live in and devote some serious episodes to. So it’s going to be a very fully real-life world. It’s not just little moments.”