A SQUAD is a small team of soldiers that works together, usually consisting of *5-10 members with each being led by a SQUAD LEADER. Multiple SQUADS form to create a PLATOON. A PLATOON LEADER/PLATOON COMMANDER leads a single PLATOON. Multiple PLATOONS form to create a BATTALION. A BATTALION COMMANDER leads a BATTALION. Multiple BATTALIONS form to create a REGIMENT, and a REGIMENT is led by a REGIMENT COMMANDER.
*Today we call some 5 member SQUADS a FIRE TEAM, depending on the nature of the SQUAD and its branch of service.
I'm not sure if this is all TL error, since these words would be confusing to translate without any understanding of a military command system, or if it's writer error, because they chose to label everything willy-nillyish, rather than do proper research.