Excellent article.
Aerial battle was often compared to knightly battles of old.
Chivalry was expected and display on numerous occasions during WWI and WWII.
Think back to the 'don't shoot a man in a parachute' *rule* for instance.
The examples used in the historical look provide some well known situations - maybe most notably the Christmas Truce during WWI. I was recently watching a Military History Channel show on the convoy operations of early WWII and there was the story of the sinking of the Bismark. One of the crew of the cruiser related how they had stated to rescue survivors until there was a reported periscope sighting in the area and then had to abandon the effort; an act which the young sailor related as a sorry feeling.