What actors and actresses appeared in Youth Marches On - 1938?

There seems to be some confusion. "Youth Marches On" is not a film title. It is a title often used for events related to youth activism.

Could you please clarify what you mean by "Youth Marches On - 1938"?

* Are you referring to a specific documentary or movie?

* Are you looking for actors and actresses who were involved in youth activism in 1938?

* Is there a specific context to this question?

Once you clarify what you are looking for, I can provide you with a more accurate answer.