Berengar was currently sitting on the seat of power within Innsbruck, kneeling before him were the surviving Lords of Northern Tyrol. Having lost their regents and the overwhelming majority of the forces they could muster in their disastrous attempt to retake Innsbruck, these men were left with little support to defend against Berengar's invasion.
Seeing as how these men were in control of the nearest provinces to Berengar's forces stationed at Innsbruck, they knew their days were numbered and that Tyrol would soon fall into the hands of Berengar. These relatively wise men had traveled to Innsbruck to officially surrender the North to Berengar, and by extension Duke Wilmar.