Why was Wudi called the Martial Emperor?

He earned this nickname because of his nearly continual wars to extend China's boundaries. He extended Chinese rule into Korea, Northern Vietnam, and Central Asia by fighting a long series of military campaigns.

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )