Would like to have Commanding Officers named chronologically,
significant missions assigned by unit and regions and organizational
data where important.
Names and dates of members assigned if available.  Additional info of
historical value welcomed.  Purpose: Unit Web Site history.

I understand that by "official" you mean a military (or DoD) site
about the  1st Special Forces Group.

I'm afriad that there isn't such a site. Therefore, and as a comment
that does not answer your question but might be helpful, I post the
following sites:
http://www.1stsfgp.org/StatementOfUnitHistory.htm 
www.globalsecurity.org/military/agency/army/1sfg.htm  
www.soc.mil/sofinfo/history.htm  (official, but wouldn't answer your
question).

If you want me to, I can check the possibility of such information to
be released to you by the military.

Yes, politicalguru-ga, if you can check on that possibility, that may
be the answer.  http"//www.1stsfgp.org is the web site we are trying
to improve and verify the history on.
Thanks,
-- miki-ga