Am I entitled to anything if my husband and I have been together for 24 years?

I’m taking care of two grandkids by marriage with one 22 years in college. I fully support college tuition and my husband have never financially supported our son. My husband has stepped out on me numerous of times and now has a two year old. He decided that he wants a divorce. He receives disability from the VA and he also works a job that has rolled his pension into for a 401K so he says he's pressuring me to sign papers.