Units with thisl rule count as having one more rank than normal for the purpose of combat resolution, up to a maximum of +4. Note that you still need to have at least one complete rank of 5 or more models for this rule to have any affect.

Profiles:

Model	M	WS	BS	S	T	W	I	A	LD	Type
Imperial Bowmen	4	3	3	3	3	1	3	1	7	Infantry