If i have the syntax wrong, fine. Thats an easy fix.
however. This is what i need to do:
Event (Pseudo or actual) Unit 1 gets within X of Unit 2.
Make sure Unit 1 is a siege tank, and make sure owning player has researched siege tech. Make sure owner of Unit 1 and owner of Unit 2 are enemy's. order tank to enter siege mode.
I'm more than open to any ideas of how to accomplish this using auras, behaviors etc. It just seems silly that the event doesnt let you return both units somehow.