If Tavar was able to find out where Hod was, and how it was that he was seeing his commands given, through his chain of messengers, then perhaps Tavar would have been able to attack him directly. But the old General simply smiled, knowing very well that Hod had already taken extensive measures in that regard.
To control that battlefield the way Hod did, in his very first time touching it, it was a mark of genius that went beyond terrifying. Into realms that ought not be. There existed yet no names for the counter-strategy that Hod had pulled off, and the strange formation that he had seen set up.
The current of the men, even just from the very offset, as Hod saw the positioning of Ernest's army changed, caused problems for Germanicus. He was not a man of strategy. He had attempted to govern his army from atop the southern wall – but that was the governance of a creature that was already mighty in one realm, and was simply using that might to push into another.
