4th Ed Overrun attacks

[Poor Yorek]

FWIW (~$0.02) I concur with Matt.

The Overrun section clearly defines an overrun as a move action, not a fire action. This distinguishes an overrun from a cavalry charge which, per 15.3 and by subsequent reference to 12.1, is assault movement - a fire action.

Whilst the parenthetical use of "AFV(s)" in the second paragraph of the Overrun section can be confusing, I think the context as a whole suggests, as Matt noted, one unit moves/overruns at a time. I think this is further supported by the use of the singular in the sentence "If the overrunning AFV or cavalry suffers ..." found in the second paragraph of the section.