leanne - I wouldn't keep questioning him, if I were you. I remember your early posts where you wanted to know more about where he was stationed, etc. - it really is better just to let him tell you what he wants to tell you.
If he's out at night with the lads, that's because it's what they do. They don't want to spend the night sitting around in the barracks, they go out - and remember that there is very little to spend their money on out there, all food, accommodation etc is paid for, so they enjoy themselves when they get a chance of a night off. My OH is ex-Forces so I know where he's coming from.
What difference does it really make where he is when he contacts you? He thinks enough of you to keep in very close touch, just take comfort from that. You have to give him some rein you don't know - nor, believe me, do you want to know - what sort of stresses he may be under "on the job" and that he is not allowed to discuss.
The talk about babies shows how much he's missing you - but you are a long way away, it makes people sentimental and yearning, and he's got plenty of time to think. When he comes home, he's got to get back to life in a civilian setting, which looks very much different from where he is at the moment.
If there are still people on here with husbands/sons/lovers stationed abroad, they will know that this is difficult. It sounds as if you honestly are behaving as if he's living up the road and you need to keep checking up on him. Please don't - you need to trust him. If he's been out with the lads and drinking he won't remember story 1 by the time he tells you story 2. He's only out getting some light relief from the day job.
By the way if he's in Europe he's an hour ahead of you, not 2 hours behind you.... so 1 am's not that unreasonable. Give him some slack.