The Knight is the fast unit of High Middle Ages. It has moderate damage and defense. It is effective against the ranged unit class but is vulnerable against the light class.
Compared to the Heavy Cavalry of the previous age, Knights gain +4 attack, +4 defense, as well as a nice movement boost of +2. As a result, for the first time, fast units have a higher defense than same age light units.
It is worth noting that at this point, Fast units start becoming a weaker unit in stats. They have moderately low attack and defense values against same age units. They also gain a special ability, Chivalry, which gives them a +3 boost in both Attack and Defense only if it is the only unit with Chivalry (i.e. Knight and Heavy Knight) in your army.

Six slightly damaged knights gathered into a triangle
Usage[]
Knights should be used singularly in battles, to allow for Chivalry to take effect, but you should use more Knights if the opposing team has a lot of Ranged and Artillery Units. Having multiple Knights requires all but one Knight to die before Chivalry takes effect. Oftentimes, using HMA Champions are a better alternative if you want to take better advantage of Chivalry as they have 3 more attack damage.
The Knight does great damage against ranged and artillery units such as the Crossbowman and Trebuchet, but is easily killed by Berserkers. The Knight is also somewhat weak against Heavy Infantry.
Knights should be used to charge into enemy lines and kill ranged and artillery units.
Against Same Age Units[]
Berserker[]
The Berserker can easily take down Knights, with their very high attack damage whilst Knights struggle to do good damage back. Knights should strongly avoid combat against enemy Berserkers unless they are finishing off a wounded Berserker, or if there are no ranged or artillery units to attack.
Crossbowman[]
Knights are very effective against the Crossbowman. The high movement speed allows them to reach the other side of the map in two turns, which means Crossbowmen cannot take full advantage of their ranged attack. The defense points against ranged units allows Knights to take more than two hits to be killed, but it is strongly advised for Knights to stay out of their range, due to their deadly attack damage.
Heavy Infantry[]
Knights are not the best choice to attack Heavy Infantry, due to the high defense that Heavy Infantry has. The Crossbowman is almost always a better choice to fight armies with Heavy Infantry. However, if needed, the Knight can attack and damage Heavy Infantry.
Trebuchet[]
Knights are very effective against the Trebuchet. Their high movement speed allows Knights to easily reach Trebuchets and do massive damage. Meanwhile, Trebuchets struggle to do meaningful damage to Knights.
History[]
Knights were men who were granted knighthood after many years of training. They were generally born into nobility, and had to progress from page to squire before finally becoming eligible to becoming a knight at the age of 21. Knights in the Middle Ages wore full chain, and later plate armor. They were trained on horseback riding and a variety of weapons. Eventually, armored cavalry and knights were made obsolete with gunpowder weapons, where a soldier trained in weeks on a firearm could bring down a knight who spent years in training. However, the chivalrous code that knights followed still continues in some knighthoods to this day.
Image[]
Three Knights
Other Military Units[]
Legend: = Light Unit Class
= Ranged Unit Class
= Artillery Unit Class
= Heavy Unit Class
= Fast Unit Class