Orcs and Goblins are extremely quarrelsome creatures. When greenskins get together they start to pick fights, bicker and misbehave in all sorts of appalling ways. They argue and fight amongst themselves all the time, and it is quite common for rivalries between individuals or even whole groups of these creatures to erupt into a full scale ruck. Even at the best of time fighting in the ranks can cause disarray and confusion in the army. One moment a mob is striding purposefully towards the enemy, and the next it is brought to a halt whilst two or more greenies settle their differences. This is a great drawback to the Orc commander, who will inevitably hear the cries of squabbling from his army and realise that his best laid plans have once more been laid low by his warriors' usual lack of discipline.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
Animosity (Orcs & Goblins)URL Copied!
Orcs and Goblins have a special Animosity rule to represent their extreme belligerence – greenskins will fight anyone, even each other! Animosity is a trait that Orcs & Goblins players have to live with – sometimes it can be a pain in the neck, and sometimes it can produce a rather good result. It's just one of those things – the Orcs & Goblins army is nothing if not unpredictable.
This is usually Orcs and Goblins banded together in mobs and they can turn minor squabbles into full-scale riots – especially when in close proximity to other greenskin units.
Animosity Test
Animosity is represented by an Animosity test. This test is taken in the Charge sub-phase after all normal charges has been declared during each of your turns, by every unit that is subject to Animosity, with the following restrictions:
Units only test if they contain at least 5 models (there aren't enough of them to cause trouble otherwise).
Units that have declared a charge don't test (they're too busy charging the enemy!).
Units engaged in close combat don't test (they're too busy fighting the enemy!).
Units garrisoning a building don't test (they're too comfortable to quarrel).
Units fleeing or currently off the battlefield don't test (they're too busy running or marching).
Roll a D6 for each eligible unit. If the dice roll is a 2 or more, the unit behaves normally this turn. If the roll is a 1, however, the unit has failed its Animosity test and must roll on the Animosity Table.