I'm going to give an incomplete answer, and opt-out so that others can provide you with more information. This is generally in violation of our guidelines, but a complete answer requires a multiple-category expert.
Social Security and Medicare provide very little benefit toward assisted living, but Medicaid might, even if you still have assets. There is a lawyer who advertises here in Southern California that he can get Medicaid to pay for Skilled Nursing Care, which I'm going to investigate for my wife when our Long Term Care insurance runs out. (If you don't know you have LTC insurance, you probably don't.)
Brookdale will probably tell you about many payment assistance options, even if you do not choose their facility.
Social Services and/or Medicaid may be able to help you. The VA may be able to help you, but I do not know if they will help spouses of veterans. If the VA will help you, they will not help pay for the basic rent, only for additional services. There are worksheets for veterans at their website http://www.va.gov/GERIATRICS/Guide/LongTermCare/Shared_Decision_Making_Worksheet.pdf , which may be helpful even if the VA cannot help you directly. f you have a friend you trust, "A Place for Mom" may be able to help you select a facility, but will probably not be able to help you with payment options.
If you have further questions for me, please ask; even though I will opt out, I should be able to see them.