Tankbustas

This unit must always attempt to shoot at and/or assault an enemy vehicle if there is one in line of sight, regardless of range. If there is no visible vehicle target, the Tankbustas may select a target as normal.

In a turn in which they assaulted into combat they add +1 to both their Initiative and Strength characteristics when attacking in close combat (note that this has no effect on the Initiative tests for sweeping advances).

Ork mobs may always choose to substitute the number of Orks in their mob for their normal Leadership value. If an Ork mob numbers 11 or more models, it has the Fearless special rule.

Once per game, the Ork player can declare a Waaagh! during his Shooting phase. This may not normally be declared on the first turn, all friendly Ork infantry units have the 'fleet' rule (not Gretchin units, they're far too weedy for a proper Waaagh!). 

If a unit rolls a 1 when making this Waaagh! movement, the Orks start fightin before they get to the enemy. One model from that unit takes a single wound. Note that the unit may still move an inch, and assault as normal.