Wow, I can't say I really have any advice for you, but I know what you're going through. My husband deployed when my oldest son was one, and I was 3 months pregnant. He was home for the delivery of the baby, but went back when he was 6 days old. All I can tell you is, "One day at a time." My husband and I look back now (he's been home for a year) and find it so hard to believe he was gone for and entire 14 months. It does go by, and I guarantee that your little ones are some of the best company you can have.
Look into the Family Readiness Group for your unit. They often have anonymous families to help you out with holiday dinners, and I had a family who donated an unbelievable amount of presents for Christmas for my son and 2 step-kids. They also put together a Christmas package for my husband.
I spent much time on the computer showing my son pictures of his dad. My husband send videos, with pictures of him in Iraq set to music. My son called them his "Daddy videos" and that made the homecoming so much more special when he saw that man he'd been calling "daddy" for a year and he recognized him.
God bless you, your husband and your family. You will make it through and you'll be amazed how close you and your babies will become. Just make sure that they don't forget daddy.
If you wanna talk ever, I'll get you my number. You may even like to talk to my husband. I know one thing he really appreciated while he was gone was that I wasn't a hysterical mess. I always let him know I was taking care of home and that he just needed to worry about himself and staying safe because it does not do them any good to worry that they've let you down or left you more than you can handle.
My husband believes, also, that being the loved one left behind is FAR more difficult and scary than being the one to be sent over. He may be right!
Also, don't watch the news. I know it's hard. The news is everywhere, but you'll find yourself needlessly worried time and time again. Just wait for those phone calls and believe your husband will return safely.
Where is he going to be stationed??