Attacking Knight's Combat Skill

I don't know that formula yet. I am still looking

not roles, the attacking knight, unappointed, what does his combat skill do, and my how much

I found this:
It is important to understand that each of these roles increase the speed of construction, training, research or production. They do not decrease the time required by the same percentage. Consider that it might take 300s to build a building with no speed bonus. That is:

Time to Build = 300s / (1.0 base speed)

A speed increase of 40% would give:

Time to Build = 300s / (1.4 relative speed) = 214s

(300 - 216)/300 = 28.7% decrease in time

Foreman

The Politics score of your Foreman increases the construction speed of your buildings by 1% for every 2 points of Politics.

Foreman Construction Speed = (1+ Politics/200 + Giant's Strength/10) * Base Construction Speed

Marshal

The Combat score of your Marshal increases the training speed of your troops by 1% for every 2 points of Combat.

Marshal Training Speed = (1 + Combat/200) * Barracks Speed Factor * Base Training Speed

Alchemystic

The Intelligence score of your Alchemystic increases the speed of your research by 1% for every 2 points of Intelligence.

Alchemystic Research Speed = (1 + Intelligence/200) * Base Research Speed

Steward

The Resourcefulness score of your Steward increases the production of resources by 1% for every 1 point of Resourcefulness.

Resource Production = (1 + Resourcefulness/100) * Base Resource Production

All I found about your idle knight that they boost your troops by the amount of combat skill they have. I don't know by how much yet.

What does the attacking knight's combat skill actually do?
i know it boosts the troops, but how? by how much? (percentage)