The ranks:
Recruit- slightly above average human being.
Private- World's strongest man.
Corporal- one hit K.O a level one zombie.
Sergeant- on the level of a level two mutated or undead creature.
Master Sergeant- One hit level two mutated or undead creatures.
Sergeant Major- Can match a level three mutated or undead, creature, in power.
Lieutenant- One hit a level three undead or mutated creature.
Captain- Can match a level four mutated or undead, creature, in power.
Major- One hit a level four undead or mutated creature.
Colonel- Can match a level five mutated or undead, creature, in power.
Brigadier General- One hit a level five undead or mutated creature.
Major General- Can match a level six mutated or undead, creature, in power.
Lieutenant General- One hit a level six undead or mutated creature.
General- Can match a level seven mutated or undead, creature, in power.
Global General- Overpower a level seven undead or mutated creature.
The ranks of mutated and undead creatures:
Level one- Athlete to Street Level
Level two- Wall to building level
Level three- Large building to City Block level
Level four- Multi CityBlock to Town level
Level five- Large Town to Small City level
Level six- City to Large City Level
Level seven - Mountain to Island Level
More info: undead or mutated creatures will drop something called celron upon death. It is a tiny crystallized brain 0.5 inches in diameter. Upon consumption, it will increase a person's power. The higher the level of the undead or mutated creature, the more it increases power.
Rank up Requirement: Recruit-1 level one Celron, Private-10 level one Celron, Corporal-50 level one Celron, Sergeant-1000 level one Celron, Master Sergeant-10.000 level one Celron...(Disaster tier) Sergeant Major-1.000.000 level one Celron, Lieutenant-10.000.000 level one Celron, Captain-100.000.000 level one Celron, Major-500.000.000 level one Celron, Colonel-750.000.000 level one Celron, Brigadier General-800.000.000 level one Celron...(Catastrophe tier) Major General-1.000.000.000 level one Celron, Lieutenant General-2.000.000.000 level one Celron, General-3.500.000.000 level one Celron...(Calamity Tier) Global General-5.000.000.000 level one Celron.