Marked the high point of Royalist advance in the First English Civil War and prompted the Solemn League and Covenant, bringing Scotland into the conflict on Parliament's side.
Key Facts
- Date
- 20 September 1643
- Royalist casualties
- 1,300
- Parliamentarian casualties
- 1,200
- Royalist commander
- King Charles I
- Parliamentarian commander
- Earl of Essex
- Outcome
- Royalists unable to block Essex's retreat to London
By the Numbers
Location
Cause → Event → Consequence
Following a year of Royalist successes including the capture of Bristol, Parliament lacked an effective army in the west. Charles laid siege to Gloucester, forcing Parliament to muster a relief force under the Earl of Essex. Essex successfully lifted the siege but faced a Royalist pursuit as he retreated toward London, with Charles's army overtaking him at Newbury and blocking his route.
On 20 September 1643, Essex launched a surprise dawn attack on Royalist lines, seizing high ground and forcing Charles onto the defensive. A day of intense fighting saw heavy casualties on both sides, the near-encirclement of Parliamentarian forces, and a critical stand by the London Trained Bands that halted the Royalist advance. With ammunition exhausted and night falling, both armies disengaged, and the following morning the Royalists were compelled to let Essex pass.
The Royalist failure to destroy Essex's army marked the furthest extent of their advance in the war. The battle's outcome directly contributed to Parliament seeking Scottish military assistance, leading to the signing of the Solemn League and Covenant. The introduction of Scottish Covenanter forces fundamentally shifted the balance of the conflict and ultimately contributed to the Parliamentarian victory in the First English Civil War.
Belligerents & Mobilization Analysis
Side A
1 belligerent
King Charles I, Prince Rupert.
Side B
1 belligerent
Earl of Essex.