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I'm sorry to hear about the hardships you've suffered! If you leave and go to your country, he may decide to file for divorce and ask for custody of your children. Depending on your home country, if they are a part of the Hague Convention, your country will assist him in gaining custody or at least not block his attempts to get the children back. If there is no evidence of the abuse (like pictures of injuries or police reports) it becomes your word against his and it's difficult for the courts to know who to believe.
You might be better off staying here in the US and seeking shelter from a woman's shelter like Safe Haven, or something similar.
I would suggest making an appointment with a lawyer in your area (many offer free consultations) and they can better advise you on what your husband's options would be .
I do not currently offer the phone call option. You may try another expert as many on here do.
Unfortunately, unless your husband is arrested for abuse and a Judge orders him to seek treatment and counseling, there is no legal means to force him to go to anger management or counseling. The court will not be able to order him to stop smoking.