Board Game Arena

Can someone please direct me to the rule about armor overrun on ergs. I played Hellfire Pass on BGA and cannot do overrun from ergs to ergs or ergs to plain. TIA

Of you move onto an erg you cannot move any further that turn.

So if you move your tanks onto an Erg in the movement fase armor overrun is not possible that turn, just shooting. Similar to moving into wire.

If you move adjacent to an occupied Erg onto clear terrain (no wire) you can shoot (uphill). If you throw a flag and your opponent retreats you can overrun.
If you start your turn on an Erg adjacent to an enemy occupied Erg and do not move you can overrun.
If you start your turn on an Erg adjacent to an enemy occupied hex and do not move you can overrun.

In the last example your overrun will work as normal with the North African tank rule: shoot, take ground into the hex you “liberated”, choose if you want to move one more hex, and shoot again.

For the other two examples the extra move of the North African rule cannot be made because you moved onto an Erg. (Similar to wire) the way this is programmed in BGA at the moment you have to click on “end all unit movement”. (For wire this is programmed automatically, but for the North African rule there is this extra step.)

Hope this helps