753 BC comes first.
They discovered chariots before 45bc, when chariot racing was born.
The first century BC. Incidentally, there was no 0th century - BC or AD.
Julius Caesar was the Roman(early italian) dictator around 45BC.
Julius Ceaser invented the leap year in 45BC
in 46BC he made it and it was brought out to the world in 45BC
After becoming a dictator of Rome for life in 45BC a year later he was assassinated.
31 days. The number of days in October has remained the same since about 45BC.
The Roman republic ran from 509 BC to officially, 31 BC. However it had been dead in all but name since Julius Caesar finished his civil war in 45BC.
Well, the calender that we currently use today by de facto is a Gregorian Calender which was devised in the middle ages; but the Gregorian calender is heavily based on the Julian Calender constructed by Julius Cesar in 45BC.
The first emperors had the name Caesar because that was their name, mostly by adoption. The later emperors used the name Caesar as a sign of their authority. Augustus was a title --- an honorific name.
Germany attacked Britain during the Battle of Britain.