- Dec 14 The Battle of Lake Borgne in Louisiana: British victory over the United States
- Dec 22 Samuel Marsden of the Church Missionary Society arrives in the Bay of Islands, New Zealand to establish the country's first mission station; Sheep, cattle, horses and poultry are introduced
Treaty of Ghent
Dec 24 Treaty of Ghent signed, ending the War of 1812 between the United States, the United Kingdom and their allies
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- Dec 25 Reverend Samuel Marsden of the Church Missionary Society holds the first Christian service in New Zealand on land, at Rangihoua
- Dec 27 Destruction of schooner Carolina, the last of Commodore Daniel Patterson's makeshift fleet that fought a series of delaying actions that contributed to Andrew Jackson's victory at the Battle of New Orleans.