Question on tactics: Assault, assault and assault

[Cole]

Road Runner,

Roger on the commonly accepted ROE. That's how I play and I think it was your's truly that first mentioned Leto's ROE for half tracks in this thread.

Just trying to discuss the game mechanics.

I'll say again I think the ROE that unsupported half tracks cannot assault armor is a good one but for the sake of argument (and if this is too pedantic then just let the question die) let's say you have the 5 strength points of IS2s. I have surrounded your units and have conducted a close assault with armor, infantry, and the infantry's half tracks. The assault results in 3 or 4 strength point loss of your armor and your remaining strength point(s) is disrupted. Only my half tracks have action points left. According to the ROE I cannot move them in to finish them off the remaining disrupted point.
What were the original half tracks doing in the original assault, less than six minutes ago, that the other half tracks can't do?