The expedition contained sizable naval and land forces. The naval forces were two squadrons consisting of: Admiral Anson's 22
ships of the line with 9
frigates crewed by 15,500 men and Commodore Howe's 1 ship of the line of 64 guns, 4 of 50 guns, 10 frigates, 5
sloops, 2 fire-ships, 2
bomb ketches, 6,000 sailors, 6,000 marines, 100 transports, 20 tenders, 10 store-ships and 10 cutters with crews totaling some 5,000 merchant seamen. The land forces were four infantry brigades consisting of: the Guards Brigade made up of the 1st battalions of the
1st,
Coldstream and
3rd Foot Guards and three brigades made up of the
5th,
24th,
30th,
33rd,
34th,
36th,
38th,
67th,
68th and
72nd Regiments of Foot, as well as an artillery train of 60 cannon with 400 artillerymen and a few hundred Light Dragoon cavalry, totaling over 10,000 soldiers. Britain's naval forces were under the command of Admiral
Lord Anson, seconded by Commodore
Howe. Britain's land forces were commanded by Lieutenant-General
Thomas Bligh. Against this the French had numerous garrison troops and militia spread thinly over the northern coast of France that would have to be concentrated at whichever place the British landed. Initially the expedition met with considerable success capturing the port of
Cherbourg. The British destroyed the port, the docks and the ships harbored there, carrying off or destroying considerable war material and goods. French troops from various places began moving on Cherbourg and the British expedition re-embarked to move against Saint Malo on 5 September but it was found to be too well defended. The weather now turned against the British as well and it was decided it would be safer to re-embark the land forces further west in the bay of Saint Cast near the small village of Saint-Cast and the towns of Le Guildo and
Matignon. The fleet sailed ahead while the army marched overland on 7 September, engaging in skirmishes on the 7th, 8th and 9th. On 10 September the Coldstream Guards were sent ahead to Saint Cast to collect provisions and convoy them back to the army. Lieutenant-General Bligh with the army camped at Matignon some from Saint-Cast. During this time
Richelieu, duc d'Aiguillon, military commander of
Brittany, had gathered some 12
regular line infantry battalions, including:
Régiment Royal des Vaisseaux,
Régiment Volontaires Étrangers,
Régiment de Bourbon,
Régiment de Bresse,
Régiment de Quercy, Régiment de Penthièvre,
Régiment de Marmande, from the garrison of
Saint-Malo and a brigade of the
Regiment de Fontenay-le-Comte,
Régiment de Brie and
Régiment de Boulonnais. They also had 6 squadrons of cavalry, some companies of coastal militia, and several artillery batteries. The French army amounting to 8,000 or 9,000 men, under the field command of Marquis d'Aubigné, was fast marching on Saint-Cast from
Brest by way of the town of
Lamballe and from the town of
Dinan. ==The battle==