Racism
In the early comics, Japanese soldiers are portrayed as squinty-eyed, sallow-skinned war criminals with overbites, driven by pure hatred and/or sadism. Furthermore, in the series of three episodes following World War II that finds the heroes in the Middle East, one of the negative characters is Jewish, named "Bronstein," and depicted in a manner reminiscent of the antisemitic strips of the World War II era. It is only in the 1950s that youth commissions, notably in France, insisted on the non-stereotyping of characters. By the 1960s, the series in fact alluded to racial tensions in the US as part of its story arcs, with Buck Danny taking a strong stance against discrimination and racism, such as in the album "Les Anges bleus" (The Blue Angels).
Read more about this topic: Buck Danny