Spousal Visa - married couple

Dear All,

Could you please advise me from your own experience:
I'm a Lithuanian national, married to a Barbadian, in Barbados.
I've got permanent residency status in the UK.
My husband commited an assault on an individual 7 years ago and spent 18 months in prison in USA. He's not commited any crime since then.
Having recently got married, I'd like for my husband to move in with me to UK. I've got financial means to sustain us.

1. What are the chances that our spousal Visa application will be agreed considering his previous sentence? Will it be most certainly refused?

2. As he commited the crime in the USA but actually never lived there, what are the chances the Home Office finds out if my husband fails to declare his sentence in a different country? (I am strongly advising him against it but he stated that there's no way The Home Office grants him a visa if he comes clean about the previous spent conviction.)

I would be grateful for any word of advice.

Xx
Naura

Please see Part 9 of the Immigration Rules:

https://www.gov.uk/guidance/immigration ... or-refusal

9.1.1. Part 9 does not apply to the following:
(a) Appendix FM, except paragraphs 9.2.2, 9.3.2, 9.4.5, 9.9.2, 9.15.1, 9.15.2, 9.15.3, 9.16.2, 9.19.2, 9.20.1, 9.23.1 and 9.24.1. apply,