HPG

MERC: Neutrals
Nexus Core: Enemies
AAHW: Enemies
Fanatics: Enemies
Inhabitants: Enemies
N51: Allies
SQ: Enemies
Demoniaks: Enemies

AAMO

Agents: Gray balaclava, White luminous glasses, Black and white agent clothes with a shoulder strap, Fingerless gloves, Walkie-talkie
Scouts: Lightweight body armor (just a vest and a small Kevlar insert just above the pockets), Gray Balaclava, Narrow white luminous visor, Headphones with a radio, fingerless gloves, black and white clothing with a belt sling
Engineers: White beret, metal mask with white visor, backpack on the back for ammunition or tools, knee pad, earpiece, radio, fingerless gloves, black and white clothing with a belt, and a small bulletproof vest on the upper chest
Sergeants: Black beret, White aviators, Ear guard, Body armor, Shoulder pad, Full gloves, Metal boots, Gray bandana over face, Black and white clothing, Radio, Ammo belt
Captains: Black and white cap, Black tactical goggles, Ballistic face mask to protect the jaws, Black balaclava, Body armor, Knee and elbow pads, Earpiece and radio, Black and white clothing, Metal boots
Foremen: Black and white helmet, ballistic welding mask, heavy body armor, shoulder pads, knee and elbow pads, gloves with metal inserts, black balaclava, radio, black and white clothing
Deltas: Black panoramic night vision devices with white illuminated visors, a headband, a black balaclava, gloves with brass knuckles, a bulletproof vest, a hood, black and white clothing

Agents: Regular foot soldiers (and targets for ridicule :)))
Scouts: Scouts and also infantrymen (Chmoshchniki :)))
Engineers: Technicians and leaders of small groups of scouts or agents
Sergeants: They are responsible for... well, all sorts of things.
Captains: Command and usually also lead squads, but from among either engineers or scouts
Brigadiers: Heavy HPG troops, used to fortify and hold various points, mostly just infantry or... well, lower-ranking HPG special forces...
Deltas: HPG Special Forces, extremely hardened bastards, and usually only used in emergency situations, in a word TERMINATORS