This is a very wide-ranging question; obviously a lot of things happened in 1811, as they do in every year. Do you have a particular country in mind?
Battle of Yanbu happened in 1811.
Figueroa mutiny happened in 1811.
QAASAD
nothing...
Kennedy assasination
The date is November 7, 1811 for the Battle of Tippecanoe. The date is November 7, 1811 for the Battle of Tippecanoe.
Blockade of Almeida happened on 1811-05-10.
Battle of Anholt happened on 1811-03-27.
Battle of Woody Point happened in 1811.
Order of Charles XIII happened in 1811.
Battle of Tippecanoe happened on 1811-11-07.