Answer:
Correct answer is army.
Step-by-step explanation:
Diocletian was one of the most important rulers in the period of Late Antiquity. He tried to restore the power of Empire through many reforms. One of them was to increase the size of the army. He believed that boundaries should be well protected and that the forts should be built and strengthened.
It is believed that he increased the number of soldiers from 400 thousands up to 600 thousands during his reign.