My mind is blown.. Did you know that tech Levels come from Army Officer Levels?

I didn't know this, but here it is: U.S. Army ranks and insignias are divided into three categories: enlisted personnel (E-1 through E-9), warrant officers (W-1 through W-9) and commissioned officers (O-1 through O-10). Non-Commissioned Officers Pay Grade Rank Abbreviation E-4 Corporal CPL. <- Midlevel E-5 Sergeant SGT. <- Senior Engineer E-6 Staff Sergeant. SSG <- Staff Engineer More: Sergeant First Class (SFC/E-7). -- Aka Senior Staff Engineer A soldier typically has 15 to 18 years of military service before being promoted to Sergeant First Class. The SFC acts as the platoon leader’s key assistant and advisor and is sometimes referred to as the platoon sergeant. Master Sergeant (MSG/E-8) -- Aka, Principal Engineer The Master Sergeant does not have as much leadership responsibility as the First Sergeant, who is also an E-8 but acts as the principal NCO in higher-level units, such as battalions or brigades. They are often specialists in their fields.