This section introduces various rules terms that you will find throughout the Core Rules and beyond. These key concepts form the basis of the Warhammer 40,000 rules, and are essential for every kind of battle.
Summoned and Replacement Units. In Warhammer 40,000 there are some rules that are used during a battle to add new units to your Crusade army. These units are only added to your Crusade army for the duration of that battle - they are not added to your Order of Battle.
The rules below detail the conditions under which a terrain feature confers the Benefit of Cover on a model. Each time a ranged attack is allocated to a model that has the Benefit of Cover, add 1 to the saving throw made for that attack (excluding invulnerable saving throws).
In this section you will find a number of additional rules or amendments to the Core Rules for Warhammer 40,000 that are used when fighting Boarding Action battles.
This guide will help you get started with games of Warhammer 40,000. For more information, see the Core Rules. Warhammer 40,000 battles are played in a series of battle rounds. In each of these, both players have a turn, broken into different phases that must be completed in order.