May 6, 1831
Fought in September 1831 between Imperial Russia and Poland
1831 treaty of Argentina
1831 treaty between the United States and representatives of the Menominee
1831 battle of the Polish November Uprising
Conflict between Ras Marye of Yejju, Regent of the Emperor of Ethiopia, and his rival from Tigray, Dejazmach Sabagadis of Agame
Battle of the Polish November Uprising
1831 during Poland's November Uprising
1831 naval engagement between France and Portugal