When I read about the effect of onshore-offshore winds, the author made the additional point that the Allied fighters/bombers had to fight the same wind on their return to base. And many German flyers racked up impressive scores by following crippled aircraft back over the lines and picking them off at leisure.
This observation was nested in a larger discussion in which the author (can't, for the life of me, remember where I read this) divides WWI pilots into three categories: the Pioneers, the Romantics, and the Professionals. The first were people who were involved in aviation before the war. They didn't last too long. The second were from the days when you could go out solo hunting, which gave rise to the "Knights of the Air, mano-a-mano duels. This too, passed quickly. Lastly, the Professionals. They were the product of squadron tactics. Guys with no inherent interest in aviation, but just soldiers in airplanes.