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This is actually a commonly confused legal concept. No, you are not "entitled" because that words suggests a guaranteed legal right by statute. That's not how the law works.
All the Uniform Service Former Spouse Protection Act did was grant state courts the same right to divide military retirement as they have to divide civilian forms of retirement in a divorce. So, can you submit a request to the state court for a division of the military retirement? Absolutely. Given the length of your marriage, is it highly likely that you will be awarded 50%? Yes, it is highly likely, but it is not a legal right until the court actually grants it.
However, if all he gets now is disability and not retirement, the court may not choose to divide the disability payments. If he gets both disability and retirement, the court can choose to divide the military retirement, and often does.