Games Workshop have posted a new Warhammer strategy article looking at Horde armies in the game.
From their website:
So, let’s talk about hordes. Throughout Warhammer’s proud history we’ve often used the word horde to describe armies. ‘A greenskin horde’ or ‘a horde of Skaven’ will be terms familiar to Warhammer players. But, with the arrival of the 8th edition of the game, a horde now means something far more than just an evocative label. It’s now a formation that units can adopt, giving large regiments of disciplined troops or massed mobs of warriors a real advantage on the tabletop. Simply outnumbering your foe is the most obvious advantage, but there are other benefits to having a horde, most notably in the form of supporting attacks.