Welcome to History: Julius Caesar's Attempted Invasion (55–54 BC)
Have you ever tried to do something really difficult, had things go wrong, and had to try a second time? That is exactly what happened to one of history's most famous generals: Julius Caesar! In this topic, we will explore why Caesar sailed across the sea to Britain over two thousand years ago, what happened when his soldiers met the ancient Britons, and why his trips were attempted invasions rather than a complete conquest.
Don't worry if dates like "BC" seem tricky at first! We will break everything down step-by-step.
1. Understanding the Timeline: Counting Backwards in BC
Before we dive into the battles, let's look at how dates work:
BC stands for Before Christ. In BC time, the years count backwards towards zero.
This means that 55 BC happened before 54 BC. Think of it like a countdown to year zero:
\(55\text{ BC} \longrightarrow 54\text{ BC} \longrightarrow 53\text{ BC} \dots \longrightarrow \text{Year } 0 \longrightarrow \text{AD } 43\)
Key Takeaway: Julius Caesar made his first attempt to invade Britain in 55 BC, and his second attempt the very next year, in 54 BC.
2. Setting the Scene: Who Was Involved?
Who was Julius Caesar?
Julius Caesar was a brilliant and powerful Roman general and politician. At this time, Rome was a Republic, which means it was run by elected leaders and the Senate. Caesar was not an emperor! (Rome's very first emperor came later and was called Augustus).
Who lived in Britain?
Britain in 55 BC was in the Late Iron Age. The people living here were Celtic Britons. Britain was not one single united country with one king. Instead, it was made up of many different independent tribes, each ruled by its own chieftain or king. Sometimes these tribes traded with each other, and sometimes they fought one another!
Did You Know? Celtic warriors were famous for charging into battle with war-paint (made from a plant called woad) and driving fast, two-wheeled wooden chariots to terrify their enemies!
Key Takeaway: Julius Caesar was a Roman general leading Roman soldiers (legionaries). Britain was home to many separate Celtic tribes.
3. Why Did Caesar Want to Invade Britain?
Julius Caesar had just spent years conquering Gaul (which is modern-day France). So why did he look across the English Channel and decide to invade Britain? There were three main reasons:
1. Military Help to Gaul (Stopping the Helpers):
The Celtic Britons were good friends with tribes in Gaul. The Britons had been sending food, grain, weapons, and warriors across the sea to help the Gauls fight against Caesar. Caesar wanted to punish the Britons and stop them from helping his enemies.
2. Fame and Glory (Prestige):
Caesar was an ambitious politician. In Rome, winning battles in mysterious, faraway lands made a general wildly popular. Conquering a mysterious island beyond the known ocean would bring him massive glory and political power in Rome.
3. Riches and Wealth (Valuable Resources):
The Romans had heard tales that Britain was rich in valuable metals like tin, iron, silver, and gold. Caesar also wanted to capture British crops, cattle, and people to sell as slaves.
Key Takeaway: Caesar wanted to stop the Britons helping Gaul, gain glory in Rome, and grab Britain's valuable metals and resources.
4. The First Expedition (55 BC): A Rocky Start
The Plan and the Fleet
In late August 55 BC, Caesar set sail from Gaul with a reconnaissance force (a scouting expedition). He brought:
• 2 Roman legions (Legio VII and Legio X) — around \(10,000\) Roman soldiers.
• Around 80 to 100 transport ships.
The Landing at Deal
Caesar first sailed towards the White Cliffs of Dover. However, when he looked up, he saw thousands of fierce Celtic warriors, horsemen, and war chariots standing on top of the high cliffs, ready to throw spears down at his ships!
Realising it was impossible to land there, Caesar sailed further along the Kent coast and landed on the flat, shingle beaches near Deal and Walmer.
What Went Wrong?
The landing was extremely tough. Roman legionaries had to jump into deep water wearing heavy armour while British warriors attacked them on the beach. Even worse, the unpredictable weather of the English Channel struck:
• A violent storm and high spring tides battered the coast.
• Many Roman transport ships were smashed, wrecked, or badly damaged.
• Caesar's cavalry (horses) could not even make it across the sea to join him!
The Retreat
Without his cavalry and with his ships damaged by storms, Caesar knew he was in danger as winter approached. After only a few weeks on British soil, Caesar repaired what ships he could and retreated back to Gaul.
Key Takeaway: The 55 BC invasion was a small expedition that struggled because of fierce British resistance and disastrous storms that wrecked Roman ships.
5. The Second Expedition (54 BC): The Big Return
Caesar Comes Back Much Stronger
Caesar did not like to lose. In July 54 BC, he returned with a massive invasion force:
• 5 legions (over \(20,000\) legionaries).
• 2,000 cavalry (soldiers on horseback).
• More than 800 ships!
Marching Inland and Crossing the Thames
When the Britons saw the gigantic Roman fleet of 800 ships approaching, they withdrew inland to the woods. Caesar landed his army and began marching inland through Kent.
To fight back, the British tribes united under a powerful war chieftain named Cassivellaunus. Cassivellaunus used clever guerrilla tactics, using fast chariots to ambush Roman soldiers when they went searching for food.
Despite these ambushes, Caesar's disciplined army pushed forward, crossed the River Thames, and attacked Cassivellaunus's fortified tribal hillfort (an oppidum), capturing it.
The Peace Deal
Cassivellaunus realised he could not beat the entire Roman army in open battle and surrendered. Caesar made an agreement with the Britons:
1. The Britons had to give Roman hostages to guarantee good behaviour.
2. The Britons promised to pay an annual tribute (a tax of money/goods) to Rome.
3. Caesar restored friendly rulers, such as Mandubracius of the Trinovantes tribe.
Why Did Caesar Leave Again?
Even though he won the battles, Caesar did not leave a single Roman soldier or garrison behind in Britain. Why?
• Bad harvests in Gaul were causing food shortages.
• Rebellions were breaking out in Gaul that needed his urgent attention.
• In autumn 54 BC, Caesar packed his entire army back onto his ships and sailed away to Gaul.
Key Takeaway: In 54 BC, Caesar defeated Cassivellaunus and forced the Britons to promise tribute, but he left no soldiers behind and returned to Gaul before winter.
6. What Was the Impact of Caesar's Invasions?
Did Caesar Conquer Britain?
No! This is the most important fact to remember. Caesar's trips were attempted invasions and raids, not a permanent conquest. Britain remained independent for another 97 years (nearly a whole century!).
Britain was not properly conquered and added to the Roman Empire until AD 43, under Emperor Claudius.
What Did Change?
Even though Caesar left, his visits changed Britain's relationship with the ancient world:
• Trade Increased: British tribes in the southeast began trading much more with the Roman world, swapping metals and grain for Roman pottery, glassware, and wine.
• Diplomacy and Influence: British chieftains began making political alliances with Rome, and Roman ideas and coins started appearing in Britain.
Key Takeaway: Britain was not conquered in 54 BC, but trade and communication between Britain and Rome increased massively.
7. How Do We Know About This? (Historical Sources)
Caesar's Own Book
Almost everything we know about these two invasions comes from a book written by Julius Caesar himself, called Commentarii de Bello Gallico (which means The Gallic Wars).
Can We Trust Caesar's Account?
As historians, we must always look at who wrote a source! Caesar wrote his book for the people back home in Rome. He wanted to make himself look like a hero. Because of this, his writing is often considered one-sided propaganda:
• He highlighted his brave victories and the size of the British armies.
• He downplayed his huge mistakes, terrible losses, and shipwrecks caused by storms!
Key Takeaway: Caesar's writings are our main primary written source, but historians treat them carefully because Caesar wanted to make himself look good.
8. Top Mistakes to Avoid in KS2 History
Make sure you don't fall into these common traps in your work:
❌ Mistake 1: "Julius Caesar conquered Britain and made it Roman."
✔ Fact: Caesar only attempted to invade. Britain stayed independent until AD 43 when Emperor Claudius invaded!
❌ Mistake 2: "Julius Caesar was the Emperor of Rome."
✔ Fact: Caesar was a Roman general and politician in the Roman Republic, not an emperor.
❌ Mistake 3: "All the Britons were one single army."
✔ Fact: Britain was divided into many different Celtic tribes that often argued, though some joined together under Cassivellaunus.
❌ Mistake 4: "54 BC happened before 55 BC."
✔ Fact: Remember, BC dates count backwards! 55 BC is the first invasion, and 54 BC is the second.
9. Quick Summary Review
• 55 BC (1st Attempt): Caesar arrived with 2 legions (\(10,000\) men). Landed near Deal. Met fierce Celtic resistance and lost ships in Channel storms. Left after a few weeks.
• 54 BC (2nd Attempt): Caesar returned with 5 legions and 2,000 cavalry (\(>20,000\) men) on 800+ ships. Marched past the River Thames, defeated tribal leader Cassivellaunus, took hostages, and demanded tribute.
• The Result: Caesar left no army behind and hurried back to Gaul. Britain remained independent for another 97 years until AD 43.
• The Evidence: We read about this in Caesar's own book, The Gallic Wars, but we must remember it is one-sided Roman propaganda.