Combat Values

[Sean]

I was having a look at the Parameter Data Editor and the section on Combat Values.
I noticed these values are in line 3 in Main.pdt .
For example in Africa At War mine reads (cannot remember if I modified it from vanilla or not),
6 60 12 120 24 240

These values correspond to 
fire low loss value
fire high loss value
defend low loss value
defend high loss value
attack low loss value
attack high loss value

What is the difference between 'low' and 'high' ;
and 

What is the difference between ' fire'  , 'defend'' and 'attack'  .



I made a note about a year ago from a thread here that was posted -
"I adjust the 60 Fire High Loss Value to 120 as well, to give a little more casualty rate!"

I would like to tweak the Combat Results Table to be more brutal ,can I only adjust this number "Fire High Loss Value" or can I adjust the other variables too? I wanted higher casualties particularly for low ratio combat attacks (as in a weak unit attacks a stronger unit). Does this mean I need to adjust "fire low loss value"?