Warcraft 1: Orcs & Humans. In this game, it was Blackhand’s Horde vs the Kingdom of Azeroth (Stormwind). Okay, we still have Stormwind Humans, and former members of Blackhand’s Horde are among the Orcs.
Warcraft 2: Tides of Darkness/Beyond the Dark Portal. In this game, the Orcs were joined by the Forest Trolls, Ogres from Outland, and had Red Dragons who were enslaved by the Orcs. They also worked with Deathwing. The Human nations formed The Alliance, and the Dwarves and Elves joined them to fight off the Horde. Of course, some Humans allied with the Horde (Perenolde of Alterac) and there were Humans vs Humans. Orcs also splintered and there was Orcs vs Orcs.
Warcraft 3: Reign of Chaos/The Frozen Throne. This game added two new factions: The Undead Scourge and the Night Elf Sentinels. The Alliance had lost some of its membership states, but still included Humans from Lordaeron, Dalaran, Kul Tiras, etc… The Dwarves were also still there, as were some of the High Elves. The Undead Scourge was a faction that consisted of the risen dead of Lordaeron & Northrend. It also had demons from the Burning Legion and Nerubians, as well as some former Black Empire units. The Night Elven Sentinels included Night Elves, Sons & Daughters of Cenarius, Faerie Dragons, Stone Giants, Chimaeras, etc… The Orcs were no longer allied with Ogres and Forest Trolls, and then met Jungle Trolls and Tauren, along with a handful of random adventuring types.
So, things kept changing during and between the games. They fought, but they also made truces. They made new allies and old allies became distant or even became enemies.
But somehow, some way, you think that WoW, with its extremely rigid system where if you’re sorted onto Team Red or Team Blue, that’s your BFF group forever and you’ll NEVER talk with the other side or work with them is THE Warcraft way…
World of Warcraft’s rigid faction system has hamstrung the story for way too long. I may not be an Orcs best friend, because they destroyed my characters homeland when he was young, but why should I be at constant war with them? Why should I hate a random Tauren just because they are welcome in Orgrimmar? It’s stupid, and it has been stupid for quite some time now.