Yes chelsea listen to Alyssa, she is wise!
My ex (and father to DD) is also a full weight wanker. He hasn't worked for about 7 years, was physically and emotionally abusive when we were together, walked out when I was 5 months pregnant, walked back in (and I was a fool to let him) when I was 8 months pregnant as he was out of a job and somewhere to live. And I had just rented a nice little house for me and DD.
I moved back to my mums (100 miles away) when DD was 4 months old and left the wanker where he was. Fucker followed me and I had 2 years of wankerness. Twice he took me to court for contact (even though I had begged him to see DD), harrassed and intimidated me, made my life generally stressfull and never paid anything towards her despite working AND taking me to court for contact lol.
He does see DD now, every other weekend. I have nothing to do with him as my mum handles the handovers. He is actually very good with DD to give him his credit, its just me that he is a bastard to. Well he was until he saw how big my DP is and funnily enough he has left me alone since then lol.
My advice to you, for what it is worth is to leave him to it. He knows where you are. Let him know when the baby is born and leave it at that and let him make any decisions re contact. If you want him to be involved (and I think it's natrual that we do want our babies to 'have a dad') then pushing him won't make that happen and will only upset you more. Let him come to you if and when he feels ready. But make sure any contact is on your terms not his.
And make sure as soon as she is here you get in touch with the CSA. As far as I know because he is in the forces (I think you said) he should be pretty keen to avoid the CSA taking legal action. But if you don't get anywhere with him be prepared to write to his CO. A private arrangement between the 2 of you is sometimes easier if he will co-operate.
Just sat and wrapped DDs christmas pressies up. Am exhausted now though lol. Think I'm going to have some soup and a little nap .