Alfred mahan told the u. s. to build a strong . armyb. navyc. national guardd. state department

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

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! : )