This issue is a variant of Battlefields: Dear Billy (Dynamite Entertainment, 2009 series) #1. There exist further variants.
This book has no date in the indicia or on the cover. The date used is the date of release.
This page contains the indicia and credits for this issue with accompanying illustrations.
The title appears only on the credits page. The first line of the story reads: "Dear Billy, You've never asked me for the full story of what happened after Singapore..."