I believe that we now have sufficient walls to protect our kingdoms. We are at a great economical state, and have the resources to train 1000 men for each post I make. We currently have a good army of 200,000, let me break it down:
Archers: 10,000
Cavalry Archers: 30,000
Light infantry: 60,000
Heavy infantry: 10,000
Light Cavalry: 70,000
Heavy Cavalry: 18,000
Royal Guard: 2,000
We have a surplus in many resources, including silver, stone, wood, silk, and grains. We're also gaining resources from trade alone which would otherwise be unheard of by our kingdom.
Now, forward we will attack the NPCs in the Saudi Arabia area, just south of what was Turkey. We'll send our light soldiers in for a raid, and leave our heavy units/archers of 70,000 in Persia for defense. If we do conquer the 6 NPC kingdoms, we won't claim it but sell it to whoever wants it. 100% of the land costs 100,000 soldiers, 50% is 50,000, etc. That is, if I defeat them. I'll report my progress on the battle later.