Letter to Margarethe Landgraffin von Hessen (20 April 1941), quoted in John C. G. Röhl, Wilhelm II: Into the Abyss of War and Exile 1900-1941 (Cambridge: Cambridge University Press, 2014), p. 1262 
1940s
                                    
“The feats of our brave troops are wonderful, God gave them success.”
            May He continue to help them to peace with honour, & the victory over Juda & Antichrist in British garb. 
Letter to Margarethe Landgraffin von Hessen (20 April 1941), quoted in John C. G. Röhl, Wilhelm II: Into the Abyss of War and Exile 1900-1941 (Cambridge: Cambridge University Press, 2014), p. 1262 
1940s
        
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Wilhelm II, German Emperor 64
German Emperor and King of Prussia 1859–1941Related quotes
US 101st Airborne Division at Bastogne in the Battle of the Bulge (22 December 1944), as quoted in Gen. McAuliffe’s Christmas message, Battle of the Bulge http://www.mtdemocrat.com/opinion/gen-mcauliffes-christmas-message-battle-of-the-bulge-1944-dec-24/
2000s, 2007, Address to the Nation (January 2007)
                                        
                                        Attributed as a quote in Charles W. Hudlin, "Morality and the Military Profession: Problems and Solutions", Military Ethics (National Defense University Press, 1987) http://books.google.com/books?id=B9EvXhH1ZVAC&pg=PA83; but Hudlin cites the biographical dramatization Patton (1970 film) which does not purport to use Patton's actual words. 
Misattributed
                                    
                                
                                    “Troops are not to be led to battle unless confident of success.”
                                
                                
                                
                                
                                    
                                    Numquam ad certamen publicum produxeris militem, nisi cum eum uideris sperare uictoriam.
                                
                            
                                        
                                        De Re Militari (also Epitoma Rei Militaris), Book III, "Dispositions for Action" 
Context: An army is strengthened by labor and enervated by idleness. Troops are not to be led to battle unless confident of success. (General Maxims)
                                    
                                        
                                        "Saul", vi. 
Dramatic Romances and Lyrics (1845)
                                    
Quoted in "I. C. Bagramyan: A Photo Album About A Soviet Marshal" - Yerevan - 1987