How did Diocletian improve the military? He created local armies.
He changed the training.
He hired more mercenaries.
He modernized the weapons.

C

Explanation:

Diocletian immediately set to work re-drawing the borders of the empire's provinces and organizing the provinces into new administrative units. He then reorganized the military, building up a stronger imperial army that fought major battles to reassert Roman dominance of disputed border regions.

u idek                                                                                                                                               /