What were barnstorming shows? Where were they held, and what were they like?

Explanation:

Barnstorming shows were very popular during the Roaring Twenties in the USA. They were essentially made out of a pilot or many pilots that sometimes formed what we now remember as flying circuses. They would perform stunts and tricks in the air and draw a big crowd to watch them do daring acts in their planes. They would be held in a field by a barn, hence the name barnstorming, and the pilots would negotiate if they could use the barn for the show and at what price.

Member nations placing armed forces at the disposal of the organization is the statement that describes a key difference between the League of Nations and the United Nations

To add, the League of Nations was an international organization, headquartered in Geneva, Switzerland, created after the First World War to provide a forum for resolving international disputes.