Deletion of Police ranks of the United States

Comment: Lack of sources doesn't mean they are unavailable and, indeed, they clearly are. Just because the rank structure is not unified does not mean there cannot be a valid article about similarities and differences (especially when there are so many similarities). Finally, it doesn't have to be  if it is possible (as it may well be) to find sources that discuss the similarities and differences accross different agencies. IMHO, this article is improvable to a standard where it will be kept and, if it isn't, I will assist in merging it somewhere else
Stance: keep
Cited policy: Wikipedia:No original research (WP:SYNTH)