I will repost that here so more people can see.
Psi General - Mind Control: Nearby enemy units have their free will ripped from them and they are reverted to your control.
Sniper General - Sniper Rifle: You get a big sniper rifle. Uses Bullet Ammo which you must buy in the shop.
Disease General - You can inflict an epidemic of death upon groups or lines of organic units. Once one organic unit touches you, he dies from the disease, and one nearby organic unit is infected. The chain continues indefinitely.
Bombardment General - You lay mines and have a huge cannon similar to the Sniper's rifle (it has longer range and larger blast radius).
Nuke General - Build nukes in your inventory area and launch them from your General.
(Does the 10 HP Ryhnadon have any significance?
Nope.