The green-skinned orcs are one of the most prolific races of Azeroth. Born on the world of Draenor, the orcs were brought to Azeroth through the dimensional gateway known as the Dark Portal and waged war on the humans while under the influence of the Burning Legion.
The orcs once cultivated a noble, shamanistic society on Draenor. Tragically, the proud orc clans were corrupted by the Burning Legion and used as pawns in the Legion's invasion of Azeroth. The orcs managed to rebel, however, and they were ultimately able to help turn the tide against their demon masters. Led by the young Warchief Thrall, the orcs have reclaimed their strength and honor. The orcs moved from the Eastern Kingdoms to Kalimdor, and there they founded the nation of Durotar.
Unlike the other races of the Horde, orcs are not native to Azeroth. Initially, they lived as shamanic clans on the lush world of Draenor. They abandoned their peaceful culture when Kil’jaeden, a demon lord of the Burning Legion, corrupted the orcs and used them in his vengeful plot against the draenei, who were exiles from Kil’jaeden’s homeworld.
Because of the demons’ manipulation, most of the orc chieftains drank the blood of a Burning Legion pit lord, Mannoroth the Destructor. This act infused the orcs with power, but at a great price: they were now enslaved to the Legion. Constant exposure to fel energies turned the orcs’ naturally brown skin to a sickly green, and the orcs’ usage of fel magic caused their ancestral lands to wither and die.
As Kil’jaeden had planned, the orcs succeeded in killing most of the draenei population. Now Kil’jaeden was ready to test the orcs’ effectiveness against another old enemy. Thousands of years before, the demons had launched an invasion of Azeroth that had ultimately failed, but this time the orcs could fight in the Legion’s stead. To that end, the corrupted human archmage Medivh contacted the orc warlock Gul’dan. Together they constructed the Dark Portal, which allowed the orcs to travel to Azeroth.
After their arrival, the orcs crushed the unsuspecting human kingdom of Stormwind. The mighty orc armies, known as the Horde, then pressed north through the Eastern Kingdoms, and their victory was nearly assured for a time. Eventually, however, internal conflicts resulted in the orcs’ defeat, and those who did not die in battle were rounded up and placed in internment camps. But a young slave named Thrall managed to escape from captivity and join a liberation force consisting of Warchief Orgrim Doomhammer and other free orcs. When Doomhammer fell in combat, Thrall became the new warchief of the Horde and the inheritor of Doomhammer’s namesake weapon.
Thrall and his people later journeyed across the sea to the distant continent of Kalimdor. Within the forests of Ashenvale, the warchief and his mentor, Grommash Hellscream, confronted Mannoroth. In the end, Grom gave his life to kill the pit lord and remove the blood-curse from the orcs forever. A new chapter began for the orcs: war was no longer the driving focus of their culture, and they settled the land along Kalimdor’s eastern coastline, which Thrall named Durotar.
Years later, the warchief and many others returned to the remnants of Draenor, now known as Outland, to prevent another attack from the Burning Legion. There Thrall met Garrosh, son of Grom Hellscream, and convinced him to join the Horde and return to Azeroth as an advisor. Garrosh was a leading commander during the battles against the Lich King in Northrend, and also gained popularity for his fiery personality.
In addition to his commitments as leader of the Horde, Thrall was a dedicated shaman with close ties to the elements. When he noticed severe disturbances in the elemental spirits, Thrall knew that he had to step down as warchief in order to investigate the situation lest all of Azeroth fall into chaos. Given his options, Thrall believed that Garrosh was the clear choice for warchief. But the impulsive young Hellscream is much more aggressive than his diplomatic predecessor. With the equally tempestuous King Varian Wrynn back on the throne of Stormwind, it seems likely that the orcs will need their famed strength now more than ever.