This is both annoying and exciting.
Charlie Squad, my first and strongest team, took the bridge outpost at D11 and was holding it against assault after assault, as this seems to be the Legion's main route to the western part of Grand Chien. We decided to head a little east, down the coast, ended up at D13 when a Legion assault squad rolled down the river past us. I assumed we would enter into combat which is why I moved us at all. Nope!
Okay then. They re-took the bridge outpost and the refugee camp, heading west and eventually killed by one of my other squads.

Now the funny part. Somehow I'm now technically on the other side of the river, with no way to head back west, no port access. This feels like a programming oversight, but I'm taking it as what you might expect from deep jungle logistics and communication. Maybe the river flooded after we crossed and we have no choice but to press even deeper into unexplored and enemy territory.
It's my main squad so I'm confident they can handle it but it's definitely a blow to my over-confidence, especially right on the heels of losing Hitman.

If we lost that whole squad... Well, that would be an incredible set-back. And we have no way of getting them supplies or moving them back into safer territory until they take the port in Ille Morat.