400 b.C.
The Celts were prominent in Europe from around 800 BC to 400 AD. They emerged during the Iron Age and spread across various regions, including present-day France, the British Isles, and parts of Central and Eastern Europe. Their influence peaked between 500 BC and 100 BC, before the expansion of the Roman Empire led to a decline in their territories and cultural prominence.
400 BC is earlier than 220 BC
From around 750 BC to 12 BC, the Celts were the most powerful people in central and northern Europe. The Celts were in Britain since well before these dates
It is not known. Your question is extremely broad because there were many Celtic groups and the Celts were originally the biggest ethnic grouping in Western Europe. The Romans fought against many of them. They were attacked many times by the Gauls of northern Italy, who were, Celts and then fought them and conquered them in the 3rd century BC. They fought the Gauls of Gallia, who were also Celts, in the Gallic Wars (59-50 BC) when Julius Caesar conquered Gaul and in subsequent Gallic rebellions. Julius Caesar also carried out two expeditions in the southeast of England, which was inhabited by Celts. The Romans fought against the Celtiberians, the Celts of Spain, in the 2nd century BC. They fought against and conquered Noricum (most of Austria and Slovenia) which was inhabited by Celts, in 16 BC. They conquered southern England in 46 AD, Wales between 48 and 79 AD and northern England in 78 AD, all of which were inhabited by Celts. They pushed into Scotland a number of times, but withdrew and the Picts (Celts) of Scotland raided Roman Britain for centuries. As you can see from the above, it would be very difficult to estimate the number of Romans who died in many centuries of fights against Celtic groups.
They tried in 1588 but failed.
55 bc-54bc
no its false 400 bc comes before 500bc and 500bc comes after 400bc
Vienna, Austria, was founded by the Celts around 500 BC, who established a settlement known as "Vinnas." The city later became a Roman military camp called "Vindobona" around 15 BC. Over the centuries, it evolved into a significant cultural and political center, especially during the Habsburg dynasty. Today, Vienna is renowned for its rich history and contributions to art, music, and architecture.
Julius Caesar led the Roman conquest of the Celts in Gaul around 55 BC. The main Celtic tribe he defeated was the Helvetii, who were attempting to migrate through Gaul.
400 BC was 2416 years before AD 2017.
No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.No emperor ruled Rome in 400 BC. In that year Rome was a republic, not a principate.