Hows about you set up a condition on your trigger utilizing the distance command
something like
naming your group of west guys g with: g=group this
then in the condition field of your trigger use this:
g distance guard1 <2
same activation
you could of course substitute g for any other units name or ID
and I'm sure there must be a way to make it to where anyone on the
West/East side coming within x meters causes the trigger to go off.. I'm
just not positive on the syntax for that one
:cheers: