What are the steps for US veterans applying for a retirement visa in Thailand?

Visa requirements should be on the embassy website. Visas are not based in previous job, like being in the military or any other occupation.

I am a retire Navy. I applied for the LTR Visa prior to moving to BKK

If you are over 50. Have 800,000 baht to put in bank or monthly equivalent coming into Thailand from pension then you are ready to go.

Do not fall victim to an agency in Thailand. You can do the simple few pages of paperwork required yourself. Being a veteran has no advantage for relevance.

USMC vet retired in Thailand for 20 years.

It seems you have plenty of income for the wealthy visa (if you are 100% P & T). Chiang Mai is a great choice too.

Also be very careful here in Thailand a lot of the women here if you're not already married or mainly looking for people with certain kinds of Visas so try not to get involved with somebody who only wants you for what you have but that's just a personal opinion not really related but also definitely plenty of people here what to help you in some regards also another little personal advice it's best to stick around for a while because at first you will be a stranger to everyone but once they get to see you more casually they get more friendlier be very careful here. I've been living in Chiang Mai since January should be easier for you than for me though because I'm a younger individual I'm probably thinking about popping over to Cambodia because it's getting really really arbitrary with the immigration laws here and the kind of requirements that they're looking for just seems like they're geared toward mainly just rich and elderly almost as if they know they could take advantage of certain individuals so be very careful be wise and whatever you do it's best to back off don't meet anger with anger here it ends horribly I know kindness is a virtue no matter how bad someone else is attitude is.

Saw someone posted a US veterans page for Thailand before, try searching for that

There are loads of people on this site ( not US veterans) who can answer this for you or you can read the details on you Thai visa embassy site. You will need to be over 50, arrive with a visa from home ( non O) open a bank account with 800K Thb, season for 2 months, go to immigration and apply for a 12 month extension based on retirement. Then you can start depositing 65k Thb every month for 12 months for the following years extension. Where the money comes from makes no difference in Thailand as long as it is an international transfer and shows as such