1348 – the black death becomes prevalent in Denmark, arriving, according to legend after a Norwegian plague ship became stranded on
Vendsyssel.[1] Population losses in the decades which followed led to the establishment of
Vornedskab, a system of
serfdom.[2]
22 July 1361 –
Valdemar IV's army lands on
Gotland's west coast, beginning an invasion of the island.
27 July 1361 – Danish forces attack
Visby on Gotland, and the city surrenders and pays a
ransom to prevent the city from being
sacked. Danish forces still sacked several
ecclesiastical buildings after the ransom was paid. Before leaving the island, Valdemar IV appointed
sheriffs to govern the island within his realm.
1367 – the
Confederation of Cologne is formed as a military alliance against the Kingdom of Denmark by city-states within the Hanseatic League.
24 May 1370 – the
Treaty of Stralsund is signed, ending the war between the Hanseatic League and the kingdom of Denmark which had been ongoing since 1361. The treaty stipulated the destruction of
Absalon's Castle.[3]
25 September 1397 – the
Treaty of Kalmar is signed uniting the kingdoms of Denmark, Norway, and Sweden under the
Kalmar Union.