After world war i and world war ii, the jrotc program saw little to no growth because of what?

Gavrilo Princip in Sarejevo.

Princip assassinated Archduke Ferdinand of Austria who was of course leader of the Austrian-Hungarian Empire. Then Austria formed a military union with Germany before declaring war on Serbia. After that, Russia came to the defense of its ally, Serbia. And France had a long standing treaty with Russia which made it an instant enemy of Germany.