Wife's share from husbands pension?

my husband and i are just separated (unfriendly) he just left the army after over 20 yrs in service,we are married for 15 yrs,lived with him for just over 12 yrs while he was in the service,we have 3 children.He got his early departure payment, am i entitled to half of that money and any pension he's going to get in the future?