Select every unit in region and order attack trigger?

[Morbid]

I'm trying to make a trigger, and too dumb right now to figure it out...

I want when a certain unit walks into region (which I have...) issue order to EVERY unit owned by that player inside a region to attack to another region.

And this trigger needs to be able to be repeated...

My problem is... that when I use this I can only see 'unit group' and that only seems to make a group of 12 or so to attack to the region. And new units that are created after this point will not respond to the trigger?

Thanks.

 

[jig7c]

do you already any trigger regarding this matter? if so post them...