You were the one who decided to help in the Stark and Bolton war. You were on Stark's side and your army was ready to help, because you also wanted to return the north and live as before.
The night before the war. You were in one of the rooms where you discussed the plan.. Jon Snow spoke his options, Tormund spoke his own..
"We will move troops from this side so that the Bolton army does not catch us in its claws. " - said Jon Snow.
Tormund raised an eyebrow and thought about the phrase "catch in the claws.". He didn't understand the meaning.
"Well.. So that we don't get caught on both sides.. Jon Snow explained, looking at Tormund, hoping that he understood.
The plan was not drawn up for a long time and Jon Snow sent everyone to bed.
"I need a drink before I fall asleep.. Sour goat's milk, not like your grape water.. " Tormund said and grinned at you and Davos, but Davos refused and you stayed together.