The Combat Arms are
the infantry units of the JDF that would engage in direct fire against an enemy. They are normally grouped together in operations to form a potent fighting force.

The Combat Support Arms (Coast Guard, Air Wing and Engineers) provide the JDF Combat units with the essential and immediate support that they need to carry out their role.

The Combat Service Support Arms (Support and Services Battalion) provide the JDF Combat units with the essential and immediate support that they need to carry out their role.