Proud Americans is a pretty big deal. I mean, a lot happens here. Ennis only scratched the surface in the prior collection detailing the secret religious organization, The Grail. In Proud Americans, we're given a bit of a back story behind Starr's hatred for their groups leader as well as their ridiculous plans involving a direct decedent of Jesus Christ.
Also, Cassidy is still being held captive and is hoping for the return of his good buddy Jesse, hoping he'll come to his rescue. Jesse however, is struggling with the thought of putting Tulip in ever increasing danger and knowing what lies ahead, he decides to make a controversial decision.
Somewhere in there, we're given an origin story for Cassidy. I'm not going to spoil anything here by saying it was pretty solid, if anything, it gives the character a bit of humanity or even sympathy, something I felt he was lacking. Made me like the ol' drunken Irish bastard all that much more.