Plucked from local farms and villages, Westerlands Militia units serve because of promises of gold, or promises of death should they shirk their duty to House Lannister.
With no formal combat training, the militia relies on their numbers to overwhelm their enemies.
Drafting units comprised of commoners is not without risk. The militia units are inefficient in their movements.
Because of this, they cannot be rallied by order tokens or Leadership cards during the Command Phase. They are also disloyal to some extent and are prone to flee when the tide turns against them.