What you need before leaving is a P-L-A-N.
The time period when a woman actually leaves her abuser is when she is in the most danger. So tread carefully OP. Please.
You mentioned no close family....Do you have any close friends here who can assist you? Clergyman??
If not then please get crisis counseling stat.
Hopefully you can also tap into any & all resources available in your area.
It is vital that you + your children get away from this toxic individual as soon as it can be done.
Put this #1 on your priority list!! No exceptions! Hopefully you can get information on housing, food assistance & counseling in your community.
And most importantly free legal advice.
If you opt to stay in the U.S. w/your kids, then you will be automatically entitled to full child support and even alimony depending how long you both were married.
Please update us to let us know how good you and your kids are faring.
The best is yet to come....You will see.
Good luck to all of you.
~ A Friend on the West Coast