Trigger Quesion.

I need to make it so that when a unit attacks another unit it only attacks it once, when I use order unit to attack another unit it kills then unit all the way, can anyone help so the unit only hits the other unit once?

Right, i did this too in a cinematic sequence...you need to find out how long a unit attack animation is, and make a trigger based on that (i mean giving a trigger a timed order TO attack), I think you should look at the cooldown time...for an estimate...(how long it takes for a unit to wait until attacking again)...
Basically
Actions:
Give Unit order(attack) an object
Wait (time of one attack)
Give unit order(stop)
Thats my thought, may it serve you well...

Woah dude thanks alot! rep added!

Lol, just order the unit to "Attack Once" its right next to attack.

Try this:
Event
A unit is attacked
Action
Order attacking unit to stop
Order attacking to attack attacked unit once

Then if you dont want that unit attacked by the same unit set a variable for attacked unit and attacking unit and turn on a trigger like this:

Event
A unit is attacked
Action
If attacked unit equal to (Variable- attacked unit) and attacking unit equal to (Variable- attacking unit) then do order attacking unit to stop.

WOW DO I FEEL STUPID!

Yea, i just gave you my method..since i had to reinstall war 3...and i have misplaced my tft cd So i can only reference war 3 roc until I find it.