platoon  
noun [ C, + sing/pl verb ] uk/pləˈtuːn/ us/pləˈtuːn/
  (GROUP)      
 (军队的)排
a small group of about ten or twelve soldiers, with a lieutenant in charge of it
  His platoon was ambushed.
 a platoon commander
 - More examples
 - Two members of the platoon were injured.
 - He led an infantry platoon on a combat mission.
 - I was a platoon leader in Vietnam.
 - They dispatched platoons of soldiers and trucks.