Orcs, also called Orsimer or “Pariah Folk” in ancient times, are sophisticated, beastlike people of the Wrothgarian Mountains, Dragontail Mountains, and Orsinium (literally translated as “Orc-Town”). They are noted for their unshakable courage in war and their unflinching endurance of hardships. In the past, Orcs have been widely feared and hated by the other nations and races of Tamriel, and were often considered to be goblin-ken. However, they have slowly won acceptance in the Empire, in particular for their distinguished service in the Emperor’s Legions. Orc armorers are prized for their craftsmanship, and Orc warriors in heavy armor are among the finest front-line troops in the Empire, and are fearsome when using their berserker rage. Most Imperial citizens regard the Orc society as rough and cruel. The Orcs of the Iliac Bay region have developed their own language, known as Orcish, and have often had their own kingdom, Orsinium.
The Orcs were supposedly created when the Daedric Prince Boethiah defeated the Aldmeri god Trinimac, transforming him into Malacath and his faithful, the Orsimer, into Orcs. When the transformation occurred is unclear, but Orcs have been inhabiting the Iliac Bay region since the early years of the First Era. Some reports say Orcs were in Morrowind acting as raiders and mercenaries as early as 1E 700. It is known that the Aldmer had already colonized the mainland of High Rock during the Merethic Era before Orcs emerged. They were viewed as a constant threat to the other races, especially after the Ra Gada drove many Orcs out of Hammerfell and greatly strengthened Orsinium. Several kingdoms banded together in High Rock and destroyed the first Orc kingdom in 1E 980. Without a home, prejudice against them was even greater.
Gortwog gro-Nagorm created the second incarnation, sometimes called Nova Orsinium, in 3E 399. He gathered enough power to force Emperor Uriel Septim VII to formally recognize Orsinium as an equal of the other lesser kingdoms of the Iliac Bay region. During the Warp in the West, Orsinium was one of the four kingdoms to gain control of the Numidium, conquering the surrounding kingdoms and baronies and swearing loyalty to the Emperor. Early in the Fourth Era, Orsinium was once again sacked by the Redguards and Bretons and presumably eliminated, and many Orc refugees were escorted to Skyrim by the Imperial Legion.
Orcish religion centers around the worship of Malacath, Daedric Prince of Outcasts, also known as Mauloch or Malak. The stories recount that Boethiah “ate” Trinimac and excreted the dung that is Malacath, although Malacath derides the story as being too “literal-minded”. The Orcs have considered themselves outcasts like their deity ever since, and this is reflected in much of their culture. For instance, unlike other races, the Orc tradition is to have weddings take place at midnight. Near the end of the Third Era, Gortwog gro-Nagorm promoted the idea that the Orcs worship Trinimac again instead of Malacath, a proposition which the majority of Orcs within Orsinium agreed with, while the majority of them outside Orsinium considered it blasphemous.Traditional Orcish society is centered around stronghold settlements, each one striving for complete independence in all matters. Orc society is based on polygamy – a stronghold’s tribe is controlled by a chieftain, who is the literal alpha male: no other males are permitted to take wives or father children. The chieftain is replaced by whichever one of his sons grows strong enough to challenge and kill him. The strength of a tribe (and the favor granted to it by Malacath) depends heavily on the personal strength of the chieftain.The law of the Orcs is based on the Code of Malacath, an unwritten law. The Code prohibits things such as theft and unwarranted violence, but also places heavy emphasis on honor and personal strength in resolving conflicts. Orcs do not use imprisonment as punishment: those who violate the code must either pay material compensation or pay a “blood price”, which entails allowing the one they offended to spill their blood until the price has been satisfied.
Orc women are expected to contribute to the strength of the stronghold just as men, as warriors, hunters, herbalists. Traditionally, the Orcish art of smithing is done by the women, and a chieftain’s second wife is called the forgewife for this reason. A wise woman handles a tribe’s spiritual matters and healing needs. However, Orcish society is still very patriarchal. All stronghold women are either the wives or daughters of chieftains, with the exception of the wise women, who are the mothers of chieftains. Daughters of the chieftain are usually traded to other strongholds to marry other chieftains.
However, many Orcs seek to escape traditional life in the strongholds. Orc women may want to escape being “just another wife” to the chieftain. They leave to join the Imperial Legion, see the world or otherwise seek their fortune; some eventually return to the strongholds, but many do not. Orcs who do not live in strongholds are derisively called “city Orcs” by those that do, and are considered soft outsiders just like non-Orcs. Given their history of provincial homelessness, frequent military service, and the demand for their craftsmanship, it’s not surprising that Orcs have traveled all around Tamriel and are now a commonplace sight in cities throughout.  Still, Orcs who live in the cities with other races are likely to face prejudice. Their appearance makes interbreeding with other races of Tamriel so rare that it is commonly thought impossible.
Orcs are famed for their use of the metal called Orichalcum, which they use to forge armor and weapons. The Orcs are also skilled in ebony smithing for this purpose.