Siege of Älvsborg (1563)

The Siege of Älvsborg (Belägringen av Älvsborg), also known as the Siege of Elfsborg (Belejringen af Elfsborg), was a siege of the Swedish fortress of Älfsborg by the Danish army under King Frederick II at the start of the Northern Seven Years' War. The siege ended in a quick Danish victory, and the Swedish commander would surrender the fort before any direct assault would be initiated.

Background
In August 1563, the Northern Seven Years' War began. Frederick II of Denmark was stationed in Scania with 28,000 men and began marching up to Älvsborg Fortress.

Älvsborg Fortress was one of Sweden's most important fortifications, and from here you could control shipping from places further inland, like Lödöse. Therefore, it was of strategic importance to control the fortress, and if Frederick were to take the castle it would be a big blow to Sweden.

On 22 August, the Danish army reached Älvsborg, made camp, and surrounded the fortress.

Siege
On 22 August, the Danish army made camp at Älvsborg and surrounded the fortress. The Swedes awaited the attack, yet supplies and reinforcements could not be sent to the besieged Swedes. On 1 September, the Danes were ready and the siege began. Under Erik Kagge, the Swedish garrison stood at 700 men and 32 cannons of various sizes. The garrison was keen on defending the castle from the Danish artillery, and Frederick II describes an incident from the siege: "We [Frederick] were in front of the castle with our colonels and men of war; and (just) as we stood outside one rampart, he shot [the enemy] with half a snake out of the castle us right overhead, not ½ cubit, midway between Count von Schwartzburg and Count Johan of Oldenburg, and the rush of the lot flew right over Jørgen von Holle while he was sleeping, and met one of his generals and broke his arm. Glory be to God who preserved us." After three days of shooting, the besiegers had made a hole in the fortification, and thereby the fortress could be assaulted. Commander, Daniel Rantzau, got the task of assaulting the fortification, however before he would do that, Erik Kagge had already surrendered.

Aftermath
After this, the Danes took much booty, including the 32 cannons in the fortress and two warships which would be incorporated into the Danish fleet. Frederick II installed Jørgen Rantzau as commander of the conquered fortress, with a garrison of four companies, later reduced to two. The Danish army would later march south to Halland where it would confront Eric XIV's army.