The US army  different special forces

Shock-troopers

Shock troopers are mostly spear heads of the infantry as they are equipped with powered exoskeletons and heavily modified weaponary and comes with large combat knives as they are knights of the armed forces.

Equipped with a M1A8 Thompson with a combat knife on the other side and their purpose to provide infantry support for the troops.

Sentry

Sentries are a heavy class outfitted with power armor that covers the body with thick platings of armor equipped with a quad fed machine guns as their role is to be a shield against enemy attacks.

(Variant of the sentry)

Scout

Soldiers that are recon, scouting parties of the armed forces as their physical prowess is peaked and heightened that they are able to see more than a normal human and posses speed and adaptability of their surroundings making them dangerous foe.

Flyboy

Warriors of the sky that has aerial packs that made them soar through the skies that breaks the sound barrier and with their supporting weapons they are important

Omega

A Super soldier that is better, faster and stronger than a normal human thanks to his peaked human condition and the ancient exo-skeleton of the ancient times.

Aui-Taui armor
is a piece of ancient technology manufactured by the society known as the Aui-Taui

The Power Suit is shown to be a powerful armoured exoskeleton that is linked with the wearer's central nervous system in order for it to be controlled neurally. it is also designed to increase the natural strength of the wearer, allowing them to perform feats of super-human strength. Due to its neural interface it can enable someone previously paralysed to walk again or injured to function properly. It is also designed with a helmet that retracts at the will of the wearer. The suit is powerful enough to enable the user to effortlessly leap high into the air, smash through robots with a single blow and tear a human being in half. The suit also provides a degree of protection against gunfire and other damages, However the suit is only wielded by those chosen by it if not chosen it would be useless because it's very heavy with over 500,000,000 tons, and those that are chosen has a very minor price that it doesn't regulate body heat making the user expose to the elements of nature (cold) as required user need to wear clothes to conceal it and for warmth.