In the engagement, Parliamentarian troops led by Oliver Cromwell sieged Pembroke Castle in Wales.

The Castle had become a refuge for rebellious Parliamentarian soldiers after the end of the First English Civil War.

He was joined by Major-General Rowland Laugharne, his district commander, and Colonel Rice Powell.

Leaving Horton with enough men to deal with Powell, Cromwell marched the rest of the army to lay siege to Pembroke.

The siege guns arrived in mid-June but over the next month they made little impact on the thick curtain walls.