I really don't know if it's going to work but you can try the signal flares close to the tactical map button if it doesn't work then hurting them could be the only way.
Thanks, TheKahn. I will try it with flares too.
Hmmm well i was trying my theory but as always Relic managed to put one over me.The flares were available in skirmish only as I noticed just a minute ago.Oh well it was a good theory , come to think of it I have never noticed that the flares weren't available in campaign.
Thanks anyway.