Third Guard. Well, we can't keep this from our wives,no matter how you work it out. You get an extra month'spay, and what happens? Everybody in the battalion knowsit, and your wife knows it too. They might even line upthe battalion and give it to you in front of everybody, sohow could you keep your wife from finding out?
The guard is basically joking about how impossible it is for soldiers to hide things from their wives.