Sweden's situation at the time was precarious, as the treasury was empty and Danish revenge plans for previous wars were a constant threat.

[2] In order to more effectively besiege Bohus, it was necessary to take control of Hisingen, which had a garrison of 600 men under the command of Hans Christoffer Kock von Crimstein [sv].

On the evening of June 4, after the Swedes had refused to surrender,[5] they opened a deadly barrage on the Bohus garrison, which consisted of 400 men under the command of Fredrich von Börstell and Carl Gustaf Fröhlich.

[2] During the initial Dano–Norwegian assault, the Swedish defenders signed an agreement to not mention the word "surrender" and to instead fight till the last man.

Any attempts to repair the damage during night time was risky and dangerous, since all outer defenses were in ruins and providing no protection.

[8] Facing these challenges, Friedrich von Börstell wrote to Gustaf Otto Stenbock on June 18 requesting reinforcements.

Unfortunately for the Swedes, 60 of the reinforcing troops were killed or injured, including Edington, who had died on June 21 from severe wounds to his right arm.

[2] Stenbock succeeded in assembling a force consisting of cavalry and militia, and he reached Bohus on July 17, additional measures to alleviate the siege such as destroying the retreat bridge at Kviström were undertaken.

By morning, the entire army had crossed to the island, Stenbock sent a captain with 60 men to secure a nearby hill, leading to a confrontation with the Danes.

The Swedish army successfully forced the Danes to retreat on the night of July 22, destroying their fortifications, bridges, and camp.