Mag'har orc

The Mag'har orcs ("uncorrupted" in Orcish), also known as "brown orcs",  are the orcs that escaped the corruption of the Burning Legion and thereby retained their natural brown or gray skin color. On Draenor, they were a result of isolation from the Horde due to being quarantined in Garadar. They have a noble shamanistic tradition cultivating a mighty tribal society that was centered around survival, regulating themselves through ritualized combat and personal honor. On the, the orcs did not take up the fel because of the intervention of Garrosh Hellscream, causing them to remain uncorrupted.

Outland Mag'har
Years prior to the Blood Pact with Mannoroth, a virulent plague known as the "red pox" spread among the orcish clans, and Geyah established a quarantine village in Nagrand, naming it Garadar after Garad. Those that were quarantined managed to avoid the corruption that plagued even their parents and the rest of the world. The orcs, and Nagrand, came to be referred to as "Mag'har" — which in Orcish means "uncorrupted".

The Burning Crusade
The current leader of the Mag'har, the venerable Greatmother Geyah, is an old and wise orc, yet she recently fell extremely ill. Garrosh Hellscream, the son of Grommash Hellscream, served as the Mag'har's military chief, aided by Jorin Deadeye, son of the venerable chieftain of the Bleeding Hollow clan Kilrogg Deadeye. Garrosh was to succeed Geyah as chieftain of the Mag'har should she pass. Warchief Thrall of the New Horde met with the Mag'har and reconnected with the old traditions. The Mag'har joined the Horde, and taught the orcs about their past and the old ways.

Several Mag'har orcs also traveled to Shattrath City, allying with Lower City.

Wrath of the Lich King
Garrosh was the first Mag'har to set foot in Orgrimmar. A number of Mag'har joined the Horde's war effort, notably during the campaign against the Lich King and the Alliance, Deathwing and in the Pandaren Campaign. Mag'har orcs in the Horde became a more common sight once Garrosh became its Warchief.

Among the Mag'har who joined Garrosh on Azeroth are Dranosh Saurfang, Cromush, Grebo, Glubgok, Lucretia, Saurboz, Gash'nul, Rok'nah, Dalgan, and Ishi. Even children like Namond and Gogu ventured beyond the Portal. Korgol Crushskull can be found at the Darkmoon Faire. Mag'har war drummers also participate in the assault on the Seething Shore.

Mists of Pandaria
While many members of the Horde rebelled against Garrosh's reign as Warchief, many loyal Mag'har sided with him and could be found in Orgrimmar and the Underhold as part of the True Horde.

Alternate Draenor Mag'har
For untold generations, the orc clans of battled one another in endless war. But when offered them the blood of his demonic masters, the disparate tribes of Mag'har—the orcish word for "uncorrupted"—refused the dark bargain and banded together to drive out the Burning Legion. United under the leadership of, the Mag'har pledged to one day repay Azeroth's heroes for aiding their cause. As war against the Alliance intensifies, the Horde must call upon the might of the Mag'har to seize victory.

Legion
Several Mag'har orcs were captured on the Broken Shore during the Burning Legion's third invasion.

Battle for Azeroth
A lot of Mag'har from the alternate Draenor, enough to field a significant force, have joined the Horde through efforts of Eitrigg.

Architecture
The architecture of the Mag'har seems to be inspired from the orcish buildings from Warcraft: Orcs & Humans. This suggests that during the First War, orcs used similar building types to those back at home on Draenor. However, over time, their buildings become more and more "warlike" and less nomadic. Those back on Draenor/Outland never changed their building style.

Notes and trivia

 * Geyah once called the land of Nagrand itself "mag'har", uncorrupted. As such, the term does not apply only to orcs.
 * The adjective derived from "Mag'har" is "Mag'hari".
 * Representatives of the alternate universe Mag'har orcs appeared in Orgrimmar with the 8.0 pre-patch, before they were supposed to show up and be made available, due to an unintentional phasing error. They were removed shortly after.
 * A large number of skins for orc characters in Heroes of the Storm make them look like Mag'har, such as, , and.
 * Mag'har, being a type of Orc, are also largely based upon Balkan, West Asian (particularly Turkish), with other varied and specific elements from other cultures.
 * For general Orc cultural inspiration, see Orcs
 * Mag'har is pronounced similar to the name have for themselves, "magyar".
 * The seven clans of the Iron Horde resemble the seven clans of the, as well as the dynamic between the clan chieftain and farseer shaman resembles the balance between the magyar , which means warchief, and , which means sacred prince and oversaw spiritual matters.
 * The unification of the Iron Horde's seven clans through a blood oath resembles the unifying the seven magyar tribes.
 * The 's lunar basis may be based upon the used by Mongolians, Turkic peoples traditionally, and others.
 * Likewise the "moonwillow" in the area whose roots extend into the Shadowmoon Burial Grounds may be based upon the recurring death-related myths and practices involving trees.

Speculation
Since mok'nathal and Mag'har orcs largely look the same, the ethnicity of characters like Orhan Ogreblade, Uda the Beast, and Lucretia is unclear.