S.M.
It's not totally the same thing, but In terms of annullment in the RC Church, I believe abusive behavior (physical or otherwise) is legitiment grounds because often these men control, isolate, and manipulate. In this way I believe you can claim that you were never REALLY able to make a free choice to marry or stay married since he hid his true nature from you. This may not affect the legal proceedings, but maybe it will halp you feel better about how you got to this point. Congratualations on making a decision that is good for your sons. Growing up in an abusive housefold is an awful thing they will have to deal with for a long time. It is likely that the situation would have escalated. However, if he is the father of your sons, I suggest that you seek counselling for all of you so that the abusiveness is discontinued as you move forward.