I agree with both of the above responses. I would get current, proficient and ready for the ATP check ride then apply at a regional airline. A LOT has changed in the past 10 years: RNAV (RNP) approaches, climb via, descend via, a move towards ICAO phraseology (line up and wait) just to name a few. Also scheduled part 121 flying is very different from the type of flying you did previously. I prefer to fly weekends so I fly with lots of new hire pilots and the ones who struggle the most are those with a combination of low flight time over a long career and dissimilar flight time. Having said that within about 6 months they're up to speed and all is fine.
You're a retired military officer so obviously you're smart and motivated. Put those traits to use. I honestly believe it would not take long for you to get hired at a major airline. The regional airlines are hiring like crazy. Get hired by one, get comfortable flying a jet in 121 ops then start networking.
Best of luck. If you ever have any specific questions about SWA send me a PM.