I could already shoot straight, but  

Literacy
YMCA membership
A new New Testament
Education in civics
Regular bathing            
        until I hit the trenches  

Trench foot
Belly crawl in No Man’s Land            
        on an empty belly
The rattle of tommy guns
        Fear that squeezed my throat                        
                Froze my heartbeat                                    
                            Summoned courage                 

A smattering of French
(outward) Sobriety
A heart for chance, the gamble            
            Horses            
            Sports            
            Cards            
            Craps            
            Not blinded by gas
            Surviving
           
Expectation of vice raids
Appreciation for social purity
            How to avoid the clap
                        If I wouldn’t use someone else’s toothbrush,                        
                                    why would I use his whore?                                    
                                                A German bullet is cleaner than that.                                                
A soldier thinking below the belt lacks efficiency.  

My wooden leg and purple heart  

                        Damn, it’s good to be home.