July 2, 1791
English riots regarding Joseph Priestley
Major battle between two Maori coalitions c. 1807
1791 battle during during the Northwest Indian War
1791 battle of the Russo-Turkish War (1787–1792)
1791 Surprise attack on Native American village by U.S. militia.
1791 battle of the Third Anglo-Mysore War
1791 death of Austrian composer Mozart