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How did Oliver Cromwell’s cavalry help win the Battle of Naseby?

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Painting of the Battle of Naseby shows cavalry and infantry clashing, with soldiers on horseback leading a charge and fallen fighters on the ground amid the chaos of battle. — English Civil Wars *Battle of Naseby*, by an unknown artist. The victory of the Parliamentarian New Model Army, under Sir Thomas Fairfax and Oliver Cromwell, over the Royalist army, commanded by Prince Rupert, at the Battle of Naseby (June 14, 1645) marked the decisive turning point in the English Civil War.

At the Battle of Naseby, Oliver Cromwell’s cavalry played a decisive role by exploiting a tactical blunder made by the Royalist commander, Prince Rupert.1

Early in the battle, Prince Rupert’s cavalry successfully broke through the Parliamentary left flank. However, rather than turning to attack the Parliamentary infantry, Rupert’s forces rode off in pursuit of the fleeing enemy, leaving the Royalist center vulnerable.1

Cromwell, serving as second-in-command to Sir Thomas Fairfax, seized this opportunity with a disciplined and well-timed maneuver. His cavalry executed a charge against the Royalist left flank, breaking through their lines. Following this success, Cromwell directed his forces to charge the Royalist infantry in the center. This assault, combined with pressure from the remnants of the Parliamentary left-wing forces, overwhelmed the Royalist infantry and forced many to surrender. When Rupert’s cavalry eventually returned to the field, they refused to reengage, effectively sealing the victory for the New Model Army.12