Note: This is a custom special rule that does not appear as a specified rule in the Main Rulebook. References to large targets appear frequently and this compiles the rules from To Hit Modifiers and Interposing Models into a single instance that covers the features of large targets.
A large target is anything which in real life would be massively tall or which is especially bulky. Giants are large targets, for example, while Men, Orcs, Elves, Ogres, Cannons and the vast majority of troops are not. In every case, a creature's description in the relevant Army book will inform you whether it is a large target or not. Cavalry riders are not considered to be large targets if they are riding horses, wolves, boars or comparable beasts. Dragons, Greater Daemons and certain war machines are large targets. The following rules apply to large targets:
Units which are shooting at a large target get a +1 to hit bonus.
Large targets can see and shoot at targets over interposing models normal-sized models (and vice versa).
Large targets moving along the ground cannot charge through any interposing models.