Soldier

Soldiers were professional fighters of the Empire. During the Corrino Empire, the most common Soldiers were the House Troopers of the individual Great Houses and the Sardaukar who were loyal to the Padishah Emperor personally. Other notable troops were free tribal militias and Mercenaries.

During the Atreides Empire, the Houses Major were stripped of their power and replaced by Emperor Paul Atreides's Jihadi Warriors and later his son Leto Atreides II's Fish Speakers. After the God-Emperor's apparent death the individual remaining factions of the empire, as well as the Lost Ones from Scattering, rose new military units on their own.

Troop Types mentioned:

Assassins
Atreides Elite - a small troop trained by House Atreides. Equal to Sardaukar-level fighters.
Bene Gesserit Guard - military trained by the Bene Gesserit after the fall of Leto II
Chouhada - Fremen tribal Warriors
Crack Troops -elite or special forces. During the Corrino Empire more or less identical with the Sardaukar.
Cymeks - man-thinking-machine Hybrids developed before the Butlerian Jihad.
Detectors -
Face Dancer Guard - Military trained by the Tleilaxu after Leto II's Fall.
Fedaykin Guard - Paul Muad'dib's Fremen Bodyguard.
Fish Speakers - Female Warriors loyal to Leto II.
Fremen Legions - The Fremen armies during the Jihad.
Futars - human-feline hybrids created by the enemy to hunt the Honored Matres.
Guardians -
Guardian Sisters - Female Elite-Bodyguard troops of the Bene Gesserit.
Guild Mercenaries - free mercenaries employed by the Spacing Guild during the Fremen Jihad.
Hunters - special man-hunt Units deployed by House Harkonnen. Also non-specified Units of the Enemy.
Imperial Bodyguard - the Padishah Emperor's Guard. Comprised of Noukkers.
Ixian Guard - the Ixian Confederacy's military.
Handlers - Augmented or mutated Humans who led and bred the Futars.
House Guard - the Military of the House Major excluding their police forces and troops deployed for imperial service.
Litter-carriers -
Muad'dib Guards - The Palace Guard during the early Atreides Empire.
Patrol - planetary police-forces, usually a section of the House-military.
Priest - accompanied the Fremen Jihadi during Paul's Conquest. During Leto II's reign, the Fish-speakers also fulfilled the role of Priest-military.
Guardians of Tleilax - The military forces of the Bene Tleilax.
Royal Guard - a subdivision of the Imperial Military.
Sardaukar Troopers - the common Sardaukar troops
Scouts - light armed Military reconnaissance units.
Searchers -
Ship guards - Spacing Guild Security forces.
Shock Troops - Assault- or leading attack troops.
Soldier spies -
Suburban patrol - part of the planetary Police forces.
Suspensor elite - Imperial Elite Units equipped with suspensor-floating devices.
Swordsmen - the close-combat specialists of the military,
Vanguard - the Campaigners or spear-point of a military force.
Mercenaries- professional soldiers who fight for money.
Light Infantry
Heavy Infantry
Armored Infantry
Armored Squads
Gunners
Pretorians
Weaponmasters
Bravos
Heavy Troopers
Thumper Infantry
Mortar Infantry
Snipers
Kindjal Launcher Infantry
Rocket Launcher Infantry
Flamethrower Infantry
Saboteurs
Militia Troops
Rebels
Scavengers
Wreckers