Cadet
A cadet is someone who is training to become an officer in the military, often a person who is a junior trainee. The term comes from the term "cadet" for younger sons of a noble family.
Cadet Media
Officer cadets of the Serbian Armed Forces
Officer cadets of the Royal Military College of Canada.
Rank insignia Dutch Air Force cadet-vaandrig (cadet-ensign)
United States Air Force Academy cadets marching at graduation.