In this fine Asterix album, after learning that there is a Roman soldier in one of the garrisons surrounding the village preparing for the (ancient) Olympic Games, the Gaulish tribe decide they should participate too, much to the consternation of the Romans. So all the males in the village go to Olympia en masse, thinking that the magic potion will give them a natural advantage over their competitors. But once the Greeks learn about the magic potion, they won't have anything with athletes using it and threaten to disqualify the Gauls (remember, this book was written in the 1960s, many years before the doping scandals surrounding the Olympic Games). This forces Asterix to enter the games on his own, without the help of the potion, against (seemingly) much stronger opponents (Obelix, having fallen into Panoramix's pot as a child, is disqualified forever of participation in the games). A great book from the Goscinny and Uderzo series.