Good thing you checked this place out. East of where Kearnen was deployed is a town bustling with war machines, clearly of goblin make given how rickety and power-inefficient they are. Nonetheless, when the townspeople take up arms against your tank on sight, they do possess strength in numbers...numbers you know your tank can't sustain. You shift into reverse and:
Keep going all the way to Sentinel Hill. Make a left turn to Kearnen just in case.