Centaur

Gondor
In the southern kingdom of Gondor, the Centaurs settled in the land for countless centuries at the time when Númenóreans arrived. Like every centaur across Middle-Earth, the Centaurs of Gondor were known to be very loyal, honorable, proud and noble in their hearts, for they would serve the kings that ruled the southern kingdom for a thousand years. Centaurs were viewed by the Gondorians to be skillful and elite knights in the military, for which those would be part of the great cavalry, and have long since protected every corner of Gondor against invaders.

Rohan
The Centaurs, who have long since lived in northern region for ages since the Elder Days, were known to be very proud, skillful, honorable, and noble in their hearts. Even when the Humans started to settle in the land of Rohan, the Centaurs didn't react or even fight against them, for they instead welcomed and became friends and helped establish the kingdom of Rohan. Many of Rohan's greatest centaurs served as elite knights in the Rohirrim Army and long since protected the borders from enemy invaders. When a large group of Hill Giants, who came from the mountains, including from Dunland, started to come to Rohan, the Centaurs knew that they posed no threat and allowed them to enter the kingdom under the behalf of the King Aldor.

Rhovanion
It is unknown how long the Centaurs have lived in the kingdom of Rhovanion, but has been told that they lived here for a very long time during the Second and Third Age. The Centaurs served as great allies to the Elves, Humans, Dwarves, Hnerheps, and Beornings. Despite being proud, skillful, honorable, and noble, Centaurs were very protective within their territory and mainly lived in the plains, for which they are ruled by a King.