Many of you probably wondered what things like S-1 meant when you saw it regarding Army records, etc. Well this should help you.
S-1 Adjutant
S-2 Intelligence
S-3 Operations
S-4 Supply
Also
XO - Executive Officer
CO - Commanding Officer
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"