1818 - The Convention of 1818 signed between the United States and the United Kingdom which, among other things, settled the US-Canada border on the 49th parallel for most of its length.
1827 - Battle of Navarino - a combined Turkish and Egyptian armada is destroyed by an allied British, French, and Russian naval force in the port of Navarino in Pylos, Greece. The most important result of this battle is the end of the Greek Liberation War and the affirmation of independence of modern Greece.