Do all armies have the same rank structure?

Basically yes.

####### Generalissimus (overall supreme commander)

XXX Colonel (regiment leader

#### Colonel General (army group leader)

###### Field Marshal (commander of the military branch)

## General Lieutenant (division leader)

##### Army General (theatre leader)

>> Corporal (squad leader)

> Lance Corporal (squad vice leader)

((>>> Company Sergeant (company quartermaster)

### General (corps leader)

# General Major (brigade leader)

(>>> Staff Sergeant (platoon leader or company quartermaster)

XX Lieutenant Colonel (battalion leader or regiment vice leader)

xx Lieutenant (platoon leader or company vice leader)

Private (does all the menial work)

xxx Captain (company leader)

x Junior Lieutenant (platoon leader)

>>> Sergeant (platoon vice leader)

X Major (battalion leader)