The Convention of Moss (Mossekonvensjonen) was a ceasefire agreement signed on 14 August 1814 between the King of Sweden and the Norwegian government.

The viceroy and heir to the thrones of Denmark and Norway, Prince Christian Frederik, was elected by the assembly as king.

[2] The de facto Swedish ruler, Crown Prince Charles John, acting on behalf of King Charles XIII of Sweden, rejected the premise of an independent Norway and launched a military campaign on 2 July 1814 with an attack on the Hvaler islands and the city of Fredrikstad.

The main Swedish thrust came across the border at Halden, bypassing and surrounding the fortress of Fredriksten, and then continuing north, and a second force of 6,000 soldiers landed at Kråkerøy, outside of Fredrikstad.

The tactic worked, and when talks began on 7 August, Charles John accepted the democratic Norwegian constitution.

Notably, Norway was no longer to be treated as a Swedish conquest but as an equal party in a union of two independent states.