[1] In the beginning of 1677 news arrived that the Norwegians defending Trondheim had moved south to reinforce the army of Ulrik Frederick Gyldenløve.
Sparre received a dispatch from Magnus Gabriel De la Gardie encouraging him to prevent this attack by moving his men either towards Trondheim or alternatively to Røros and on through the valley of Gudbrandsdal to Värmland.
Sparre chose the latter alternative, detaching major Carl Rutencrantz with a force to Oviken, but delaying his own departure to await a promised complement of 1,400 men from Österbotten.
Before news of this action had reached Sparre, he had decided to move his remaining troops north to Brunflo in order block the Norwegians' access to Storsjön.
His army had been reinforced to 1,700 men but he dared not attempt to stop the Norwegian force, as he had convinced himself he was surrounded by larger enemy numbers.
Horn assembled his men in Medelpad in the fall of 1677 and had hardly begun his march into the Jämtland when news reached him that the Norwegians had already left.
As he was entering Jämtland, Horn received a letter from the king, where he was ordered to investigate the reports of treachery from the local people.
Horn learned that a secret alliance had been made between the people of Jämtland and the Norwegians, ratified with the local communities' seals.