4th Ed Overrun attacks

[Hugmenot]

Cavalry units move one at a time when charging but the assault is conducted only after all the charging cavalry units participating units have entered the assault hex (some may have been stopped short as a result of opportunity fire).

Same principle for assaults, While I tend to grab all units and leaders which will assault an hex and move them together into the hex, it is technically incorrect, Units should move one at a time but as there are no opportunity fire possibility against units which start adjacent to the hex they are assaulting, it generally makes no practical difference whether they move one at a time or all together.

Note that it matters if the assault hex contains a minefield. If your first unit that enters the assault hex gets blown off by the mines, the second unit may just want to fire against the hex and no longer assault it.

For charges, it is almost always important because the defenders will generally use opportunity fire against the charging cavalry units. Cavalry units move one at a time and only one cavalry unit is affected by the results of any opportunity fire.

I have not looked at the Overrun rules yet so I will keep quiet for now,