Here are some statistics concerning the veterans homeless:
23% of homeless population are veterans
33% of male homeless population are veterans
47% Vietnam Era
17% post-Vietnam
15% pre-Vietnam
67% served three or more years
33% stationed in war zone
25% have used VA Homeless Services
85% completed high school/GED, compared to 56% of non-veterans
89% received Honorable Discharge
79% reside in central cities
16% reside in suburban areas
5% reside in rural areas
76% experience alcohol, drug, or mental health problems
46% white males compared to 34% non-veterans
46% age 45 or older compared to 20% non-veterans
Female homeless veterans represent an estimated 3% of homeless veterans. They are more likely than male homeless veterans to be married and to suffer serious psychiatric illness, but less likely to be employed and to suffer from addiction disorders. Comparisons of homeless female veterans and other homeless women have found no differences in rates of mental illness or addictions.
http://www.airforcetimes.com/news/2012/12/gannett-homeless-iraq-afghanistan-veterans-122612/
Homelessness soars among US Iraq and Afghanistan war veterans
http://www.wsws.org/en/articles/2012/12/31/vets-d31.html