The successful Parliamentarian relief of Gloucester prevented Royalist control of the Severn Valley and halted Royalist momentum in the First English Civil War.
Key Facts
- Siege start date
- 10 August 1643
- Siege end date
- 5 September 1643
- Duration
- Approximately 26 days
- Parliamentarian governor
- Lieutenant-Colonel Edward Massey
- Royalist siege leader
- King Charles I
- Relief commander
- Earl of Essex
By the Numbers
Location
Cause → Event → Consequence
Following the costly Royalist storming of Bristol on 26 July 1643, King Charles I sought to extend control over the Severn Valley. He invested Gloucester expecting a swift surrender, but the city under Governor Edward Massey refused to capitulate, compelling the Royalists to mount a full siege using bombardment and mining operations.
From 10 August to 5 September 1643, Royalist forces besieged Gloucester, bombarding its walls and attempting to breach the east gate by mining. Massey conducted an aggressive defence with frequent raids on Royalist positions. The Royalist artillery proved insufficient, ammunition ran short, and miners were nearing the gate when the Parliamentarian relief army under the Earl of Essex approached.
The arrival of Essex's Parliamentarian army forced Charles I to abandon the siege on 5 September 1643, ending the Royalist campaign to dominate the Severn Valley. The failed siege checked Royalist momentum at a critical stage of the First English Civil War and preserved a key Parliamentarian stronghold in the west of England.
Belligerents & Mobilization Analysis
Side A
1 belligerent
King Charles I.
Side B
1 belligerent
Lieutenant-Colonel Edward Massey, Earl of Essex.