Ran across this by accident:
Definitely after the Nationals since we see Miho in the upgraded Panzer IV and the Hertzer. Oarai appears to have the same number of tanks from the National finals. Looks like the Hertzer and StuG are setting up for an ambush in one scene. It also looks like at least one battle is against Gloriana (Darjeeling!) and it appears to be an actual match. We also see the scene where the still came from of Nishi Kinuyo and her Chi-Ha 97 but it’s not clear which team she belongs to. Can’t wait!