Warcraft: Orcs & Humans/Walkthrough

Although the Single Player Human and Orc Campaigns are separate, they intertwine chronologically: for example, in the second scenario of the Human Campaign, you prepare Grand Hamlet for an attack that occurs in the third scenario of the Orc Campaign. Thus to play through the story in chronological order you should alternate between the two, starting with the Human Campaign.

While ../Human structures/ and ../Orc structures/ are identical or analogous in almost every way except appearance (the only other difference is that Human Stables are 3x3 while an Orc Kennel is 2x3), there's more variation between ../Human units/ and ../Orc units/: