The conduct of General Bonaparte, then first consul of France, soon produced another war, which commenced in 1803, when the regiment was augmented to six hundred and four men and the same number of horses; it was quartered at Hounslow, Windsor, and Hampton Court, and held in readiness to assist in repelling the threatened French invasion by an army assembled at Boulogne.
1804
The French armament continuing at Boulogne, and the preparations for invading England being augmented, in 1804, the regiment occupied Sandwich, Stonar, and Ramsgate, with an establishment increased to eight hundred and fifty-four men, and seven hundred and fifty-four horses, which was subsequently augmented to one thousand and sixty-four men, and the same number of horses.
1805
1806
In the autumn of 1805, the French army marched for Germany, and the project of invading England was laid aside. Towards the end of the year, the regiment was quartered at Canterbury; and in September, 1806, it occupied Deal, Sandwich, and Ramsgate, its strength being reduced to eight hundred and fifty-four men and horses.
1807
1808
In the summer of 1807, the Thirteenth were distributed in quarters at Kingston, Richmond, and Twickenham. The regiment was reviewed by the Prince of Wales and the Duke of York, and, in consequence of the high opinion formed of it by their royal highnesses, the order for its march to Dorchester was countermanded, and it was detained to form, with the Twelfth Light Dragoons, a brigade, under the command of Colonel Bolton of the Thirteenth, which brigade was reviewed by His Royal Highness the Duke of York. The Thirteenth afterwards proceeded to Dorchester and Weymouth, from whence detachments were sent to Radipole, Wareham, Bridport, and, in the beginning of 1808, to Blandford, Trowbridge, and Gosport.
The regiment was reviewed by His Royal Highness the Duke of Cumberland at Dorchester. Its establishment of horses was reduced to seven hundred and fifty-four: it assembled at Exeter for review, and was distributed in quarters at Totness, Modbury, Truro, Taunton, Honiton, Tiverton, and Exeter.
1809
In the summer of 1809, the regiment was quartered at Hounslow, Hampton Court, Richmond, Twickenham, Chertsey, Staines, and Egham, and was reviewed by His Royal Highness the Duke of Cambridge, and subsequently by His Royal Highness the Prince of Wales, attended by their Royal Highnesses the Dukes of York, Clarence, Cumberland, and Cambridge, the Duke of Brunswick Oels, &c.