ok first of all there are diffrent ranks for diffrent parts of the military like the marines, navy, army, and airforce. but in airsoft you probally want to have just marines and army so here they are:
ARMY
Private
Private First Class
Specialist
Corporal
Sergeant
Staff Sergeant
Sergeant First Class
First Sergeant
Command Sergeant Major
Sergeant Major of the Army
Warrant Officer 1
Warrant Officer 2
Warrant Officer 3
Warrant Officer 4
Master Warrant Officer 5
2nd Lieutenant
1st Lieutenant
Captain
Major
Lieutenant Colonel
Colonel
Brigadier General
Major General
Lieutenant General
Army Chief of Staff
General of the Army
Marines
Private
Private First Class
Lance Corporal
Corporal
Sergeant
Staff Sergeant
Gunnery Sergeant
Master Sergeant
Master Gunnery Sergeant
Sergeant Major of the Marine Corps
Warrant Officer 1
Cheif Warrant Officer 2
Cheif Warrant Officer 3
Cheif Warrant Officer 4
Cheif Warrant Officer 5
2nd Lieutenant
1st Lieutenant
Captain
Major
Lieutenant Colonel
Colonel
Brigadier General
Major General
Lieutenant General
General
when you say ranger you are talking about the Army Rangers and plus thar has nothing to do with support gunners the army rangers are a special forcse unit which is deployed anywhere in the world easily in 14 hours.
the units in the army or marines is like this:
ill say the unit,howmany men are ussally in it, and who is incharde of them
Squad-10 men-Staff Sergeant
Platoon-4 squads-Lieutenant
Company-4 platoons,HQ-Captain
Battalion-4+ companies,HQ-Lt. Colonel
Regiment-2+ battalions, HQ-Colonel
Brigade-3+ regiments,HQ-Brig. General
Division-3 brigades, HQ, support units-Maj. General
Corps-2+ divisions-Lt. General
Army-2+ corps, HQ-General