No, I don't expect them to know what a squad actually is, but they ought to if they're reporting on military-related events. I saw a picture of the supposed Russian troops on another site, and it only shows 5 troops.
If this really is a photo of the actual troops that arrived, perhaps it is only a squad. If a large battalion or something arrived, they'd likely want to take a picture of a greater number of troops to elicit whatever emotional response. So, maybe it was only a squad, and
maybe they're doing nothing other than guarding their ship or protecting some diplomats.