In 1793 France declared war on England and many refugees of the French Revolution flooded into the island.
Napoleon regarded Jersey as a thorn in his side and began to amass an army of 20,000 troops and squadrons of the French fleet in St. Malo, ready for attack.
It had been decided, after the Battle of Jersey, that local defences should be improved and upon the arrival of the new Lieutenant-Governor, General Don, the high land above the town of St. Helier was compulsorily purchased and construction began on Fort Regent.
A network of round towers was already under construction all around the coast and General Don organised the building of roads across the island for rapid transport, introduced a signalling system and prepared his army for war.
Napoleon's fleet suffered severe losses during the Battle of Trafalgar with Admiral Nelson and the planned invasion of the island never materialised.