In the military, subalterns are officers of the lowest ranks.
Subalterns are the newest and least experienced officers in the military.
Examples:
The subalterns led the soldiers into battle.
The subalterns are learning how to be good leaders.
The general gives orders to the subalterns.
The subalterns are like the new kids at school.
The subalterns have to follow the orders of the higher officers.
The subalterns are the first ones to go into the dangerous places.