English Civil War

1642 – 1651

Overview

The English Civil War was fought between the forces of King Charles I (Royalists, or "Cavaliers") and the English Parliament (Parliamentarians, or "Roundheads"). It ended with Charles I's execution in 1649, the establishment of the Commonwealth, and eventually the Protectorate under Oliver Cromwell. The war coincided with similar conflicts in Scotland and Ireland, collectively known as the Wars of the Three Kingdoms.

Militarily, the war was fought with the transitional weapons of the mid-17th century — the pike-and-shot system still dominant, but with flintlock muskets beginning to replace matchlocks, and the cavalry tactics of the era under active development.

Infantry Weapons

Muskets

Both sides initially relied on matchlock muskets, with flintlocks becoming more common as the war progressed:

• Matchlock musket — The dominant infantry arm at the war's start; .75–.80 caliber; required a lit match at all times
• Flintlock (doglock) — The English doglock — a transitional flintlock with an external safety catch — appeared during the war and was increasingly issued, particularly to Parliamentary forces
• Musket rest — Early in the war, heavy muskets required a forked rest; lighter muskets that could be fired without one were increasingly used

Pike

Pikemen remained roughly equal in numbers to musketeers at the war's start, with proportions shifting toward musketeers as the war continued. A 16-foot pike was standard; some forces shortened them for practicality.

The Plug Bayonet

The plug bayonet appeared toward the war's end — a blade inserted into the musket's muzzle, converting it temporarily to a pike. Its limitation (the musket cannot be fired with it inserted) made it only a transitional solution.

Cavalry Arms

Royalist Cavalry (Prince Rupert's Horse)

Prince Rupert of the Rhine commanded Royalist cavalry in the aggressive Continental style — heavy charge with sword, pistols discharged at the moment of contact. Effective tactically but prone to pursuing routed enemies too far (a recurring problem at Edgehill and Marston Moor).

Parliamentary Cavalry (Ironsides)

Oliver Cromwell developed the Ironsides — cavalry trained to charge hard but maintain discipline after a charge, rallying and returning to the battlefield rather than pursuing. This discipline proved decisive.

Cavalry weapons:

• Cavalry saber — Broad straight or slightly curved blade; primary melee weapon
• Horse pistols — Typically a brace (pair) of flintlock or doglock pistols in saddle holsters
• Carbine — A shorter musket for mounted use

Cuirassier Armor

Heavy cavalry (cuirassiers) wore back and breastplate, gorget, and often three-quarter armor. The distinctive pot helmet (lobster-tail pot) became the iconic Parliamentary cavalry helmet. Royalist cavalry often wore less armor, relying on speed.

Artillery

Both sides used artillery in sieges and in the field. The New Model Army (formed 1645) standardized Parliamentary artillery under professional command.

• Demi-culverin — Medium field gun; 9-pounder; standard field piece
• Saker — Lighter field gun; 5–6 pounder
• Mortar — High-trajectory siege weapon; used in the numerous castle and town sieges

The New Model Army

Parliament's creation of the New Model Army in 1645 was a significant military development — a professional force with standardized pay, training, and equipment. Its weapons were increasingly standardized, anticipating later army organization. The New Model Army's discipline and equipment superiority proved decisive at Naseby (1645).

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