Hypothetical military stationing questions?

I'll try to answer this with some common sense.Where a unit's home base is really has no bearing on combat losses. It is where they end up in a combat zone, or happen upon in a combat zone, that causes losses. One day it could be the 3rd getting beat up, tomorrow it will be the 2nd. The enemy doesn't go after you because those guys are from the 3rd Bn, lets shoot more of them today. Now it could be rotations but look, take the weather into account if you will but if you think your chances of survival are greater or less in one unit over the other that is a roll of the dice. The 3rd Bn got beat up this time, who is to say when you get to the 2nd they aren't gearing up to head straight for the same grid zone the 3rd just left? My whole company spent four months in one area, our replacement company lost four guys in the first week after we left, you just never know and it had nothing to do with "they were from Carson and we were from Stewart." Pick the family and weather thing that suits you best and hope for the best when you land in Afghanistan.