The History of Plymouth in Devon, England, extends back to the Bronze Age, when the first settlement began at Mount Batten a peninsula in Plymouth Sound facing onto the English Channel. It continued as both a fishing and continental tin trading port through the late Iron Age into the Early Medieval period, until the more prosperous Saxon settlement of Sutton, later renamed Plymouth, surpassed it. With its natural harbour and open access to the Atlantic, the town found wealth and a national strategic importance during the establishment of British naval dominance in the colonisation of the New World. In 1620 the Pilgrim Fathers departed from Plymouth to establish the second English colony in America. During the English Civil War the town was besieged between 1642 and 1646 by the Royalists, but after the Restoration a Dockyard was established in the nearby town of Devonport (later amalgamated with Plymouth). Throughout the Industrial Revolution Plymouth grew as a major mercantile shipping industry, including imports and passengers from the US, whilst Devonport grew as a naval base and ship construction town, building battleships for the Royal Navy – which later led to its partial destruction during World War II in a series of air-raids known as the Plymouth Blitz. After the war was over, the city centre was completely rebuilt to a new plan.