— Do you always wear a gun over your underwear?!?
— Just lately.

The War Wagon is that comparative rarity, a Western filmed with quiet good humor. It is also a point of departure for John Wayne, who plays a bad guy for just about the first time in his career […]. And, in new firsts for movie nudity, Wayne plays a scene in his long johns, and Douglas appears wearing nothing but his gun belt. Now we’ve seen that, I guess there’s nothing to look forward to but Jane Fonda with her clothes on. — Roger Ebert