Deletion of Third Reserve Army of Observation

Comment: Actually, the opening sentence of MILUNIT (which is an '''essay,''' not a guideline, and "widely accepted" according to whom?) is "As for any subject on Wikipedia, presumption of notability for a military unit or formation depends wholly on the existence of significant coverage in multiple reliable secondary sources that are independent of the subject."  Obviously an essay can't be used as a reason to keep.  We need more than a casual mention in a book, we need ''multiple'' reliable sources discussing the subject in detail.  I don't doubt the unit existed, but that's no better than a  argument
Stance: delete
Cited policy: Wikipedia:Arguments to avoid in deletion discussions (WP:ITEXISTS)

Comment: subject of article clearly meets , and can be |verified to have existed by these two pre-internet sources (http://books.google.com/books?id=5X0EAAAAQAAJ&pg=PA371&lpg=PA371&dq=Russian+%22Army+of+Observation%22&source=bl&ots=YpPiVxRHtQ&sig=kd2ApYS9WIfMeLX9cFkwm_Nk6kc&hl=en&sa=X&ei=ycRCVPiiL7DSiQLFq4HwBA&ved=0CDkQ6AEwBA#v=onepage&q=Russian%20%22Army%20of%20Observation%22&f=false 1, http://books.google.com/books?id=4mItAAAAYAAJ&pg=PA268&lpg=PA268&dq=Russian+%22Army+of+Observation%22&source=bl&ots=uzr9KvaoBG&sig=2V--lpuxrJ6vs_n0SseMLrcbkok&hl=en&sa=X&ei=ycRCVPiiL7DSiQLFq4HwBA&ved=0CD8Q6AEwBg#v=onepage&q=Russian%20%22Army%20of%20Observation%22&f=false 2), and this http://books.google.com/books?id=Zk_NjPQuNXYC&pg=PA50&lpg=PA50&dq=Russian+%22Army+of+Observation%22&source=bl&ots=DDlrrcAmfT&sig=HLphxFu8CtGtBvupCeWiX1IvZOA&hl=en&sa=X&ei=ycRCVPiiL7DSiQLFq4HwBA&ved=0CEEQ6AEwBw#v=onepage&q=Russian%20%22Army%20of%20Observation%22&f=false more recent source
Stance: keep
Cited policy: Wikipedia:Notability (WP:MILUNIT||WP:VER)

Comment: Certainly not much online, but enough to confirm its existence. I've added a reference to the article. And as a formation, it qualifies for notability under , a widely accepted standard
Stance: keep
Cited policy: Wikipedia:Notability (WP:MILUNIT)