I have posted about this issue here, here, and here.
As noted previously on this blog, there have been some notable recent examples of judges reducing a sentence based on the hardships a defendant previously suffered as a result of military service. Now, as detailed in this local article from Kansas, this concept is getting some legislative attention:
Judges would be able to reduce sentences for defendants who are combat veterans and have post-traumatic stress disorder, under a bill being considered by the Kansas Legislature.