Not what one might expect from an Indiana Jones adventure.
When I was a kid I loved the Indiana Jones movies for their "exotic" locations and their action-packed action sequences. I liked the pursuit of mystical magical artifacts and it's always fun to see a Nazi get punched.
But the older I've gotten, the more I've become aware of the ethos of Indiana Jones: the moral code under which he operates. One can assume that Indy's got a fairly strong moral compass, seeing as he constantly beats up archetypal "bad guys" like Nazis and sacrificial cult members. But for a long time, I didn't realize that Indiana Jones wasn't political. He's an American, at times enlisted by the government. But he doesn't go after the bad guys because they're enemies of the USA. He defends what he considers to be "good" and tries to stop what he considers "bad", regardless of affiliation.
Such is the case in The Peril of the Fort, the third installment in The Young Indiana Jones Chronicles. Indy is at war, acting as a bike courier who delivers messages to the front lines. Being war, there's plenty of action, gun violence and murder galore. But unlike some of Indy's other adventures, the tone here is a lot less fun. War is hell, this comic makes abundantly clear, and further emphasized by the callous and uncaring conversations of the generals, willing to send soldiers to die if it advances their personal military career.
It's not much discussed in the movies, but it's canon that Indy fought in World War I, and carries a disdain for war and its participants as a result. That is why Indy punches Nazis: not for any sort of national pride, but because they they seek these mystical artifacts to escalate war, and he wants nothing to do with it.
It's an engaging read that adds another layer to Indiana Jones's character. It's sometimes argued that Indy is an icon, nothing more than a hat and a jacket and a whip. It's stories like this, The Peril of the Fort, that makes me think there is more to Indy than meets the eye.