and I am not that familiar with eventhandlers .. could you give exact command?
As you've already gathered, no. ;D
The point is that your question boils down to "would somebody please write my script for me", which is probably why nobody has answered. If you're not familiar with eventhandlers, then it's your responsibility to get familiar. There's some good stuff in the Ed Depot and the forum search function sometimes comes up with very helpful threads.
If there's a particular aspect of eventhandlers that is confusing you, then we'd be glad to help.
?behaviour unitname == "COMBAT":blah blah.....
If you don't understand roughly what this line is getting at then read
- snYpir's Friendly Intro to code snippets
- Johan Gusafsson's Scripting Guide
- online version of the command reference, particularly the "Scripting topics" section
- unofficial command reference guide
- macguba's guide to mission editing for beginners
- snYpir's OFPEC Guide: making missions