Soldier

Soldiers are a variation of Grunts that appear in Area 66.

Standard Soldiers
They are men wearing full body suits of armor that is almost completely light, with the exception of the gloves and boots they wear. Their chestplates, which are held up by two straps, read DW, which most likely stands for DeathWatch.

Elite Soldiers
Elite Soldiers are noticeably brawnier than their subordinates, and wear a different armor that has a fortified chestplate and large shoulderpads, a more elaborate helmet with a large crest on it, as well as boots that have a caution tape like design on the front.

Description
The Soldiers are a group of well equipped enemies who wield electric canes and riot shields, while their elite wield chainsaws when not using the same cane-and-shield combo that some of their subordinates do.

The shields that the soldiers carry protect them from 3-hits of Jack's chainsaw, as well as prevent them from grabbing him, but are useless against his punches and kicks.

Trivia

 * Their appearance is a parody of Storm Troopers from Star Wars, as well as the Cylon Centurions from Battlestar Galactica.
 * They might be partially inspired by the Combine Civil Protection from the famous first person shooter series Half-Life, due to their disorted voices and use of electric canes as a weapon.
 * The appearance of the Elite Soldiers armor might be a reference to the Power Armour worn by countless characters, both major and minor, from Warhammer 40K, as their armor shares the same impressive shoulder pads that makes the wearer appear to have a top heavy build as the Power Armour does.
 * They fight and act almost exactly the same as the Thugs from Varrigan City, with the exception that they cannot be frightened and they will also not fight among each other
 * They are also the only other enemies to appear in a Motorcycle level, and thus, are the only other enemy group to ride buggies.
 * The Buggy riding soldiers and their vehicles are referred as Greys and bikes respectively by Kreese and Howard, it is unknown if this an act of error on the part of John Midaggio and Greg Proops, or if they were formerly Motorcycle riding Greys in a beta version of MadWorld.