The four races

[Neo]

Below I've outlined what I think are some of the advantages/features of each race. Feel free to add.

Humans
Speedy construction
Call to arms
Invisibility
Mass teleportation
Masonry
Blizzard spell

Undead
Raise corpses
Strong Defense
Haunted gold mines
Possesion
Summoned Structures
Shades

Orcs
Power Offense (Chain Lightening, Earthquake)
Battle Stations
Spike barracades
Pillaging
Strongest units

Night Elves
Unlimited Lumber
Mobile structures
Moon well healing
Shadow melding
Tranquility spell