I'd be astonished if there weren't reinforcements. Russia keeps threatening; it'd be idiotic to not have a full scale war game on the territory they're most likely to advance over. NATO includes militaries from multiple nations, they do practice together so there's unlikely to be boneheaded things like one group being unable to communicate with another, but there might be some unknown unknowns lurking. Finding them with a 'dress rehearsal' might surface one - and fixing it can save lives.