KanjiJLPT N2
Squad

squad, corps, unit, group

Mnemonic

A king raises a knife and slices his kingdom clean down the middle. A second king emerges from the other half. Each king commands his own warriors, but together they march as one fearsome squad.
Additional thoughts
Picture the kanji visually: king on the left, knife blade in the center, king on the right — the knife literally divides the two kings into halves of the same squad. Two rulers, one unit.
Quick recall
Two kings split by a knife form one deadly squad.

Details

The keyword for 班 is squad. This kanji refers to a small organized group of people working together, much like a military squad or a team assigned to a particular task. It conveys the idea of dividing people into groups or units for coordinated action. In broader usage, it can also refer to any organized unit, class group, or work shift.
On'yomi
はん