Denmark’s Jutland peninsula in 1348 comes under the control of Danish king Valdemar IV, who, as part of his efforts to unite the Danish kingdom, seeks to regain possession of Funen (Fyn) Island, held by the county of Holstein as collateral on a debt.

Under the 1348 Treaty of Nebbegard, Valdemar receives from the Holstein courts half of Funen and a favorable opportunity to gain the other half.

The treaty’s terms come under dispute, however.

Valdemar, with his increased income, is able to pay for a larger army and by treachery comes into possession of Nyborg Castle and eastern Funen Island and the smaller islands.

Resorting to armed conflict, he wins a victory near Gamborg Castle to obtain possession of all of Funen.