With "New France" now in British hands and the "World War" still in progress much needed troops could now be despatched from America to other areas. In November 1761 the 35th Regiment of Foot found itself in the company of ten other regiments under the command of General Monckton embarked at New York in preparation for operations against French (and eventually Spanish) possessions in the Caribbean.

By January the augmented fleet arrived off of Martinique where the army began landing a short distance from Fort Royal, the whole army being ashore by the 20th. On the 20th both "flank" companies were heavily involve in action against a French line drawn up in front of the town. After a brief but fierce action the French retreated into the town (The 35th loosing 4 dead 17 wounded).

The British army now proceeded with siege preparations. During the night of January 27th the French mounted an attack against the British positions which the massed Grenadiers (including those of the 35th Foot) not only repulsed, but in the counter attack which followed, forced their way into the French redoubt. This position had the additional bonus of overlooking the town's citadel. (losses for the 35th Foot were 4 wounded) on the 30th of January the British batteries opened fire on the town which surrendered on the 4th of February, the whole island falling into British hands shortly after. (During three successive wars, British forces captured Martinique from the French only to see the island restored each time under the peace treaties).

On January 4th 1762 Britain had declared war on Spain and on news reaching the Crown forces, General Monckton began planing action against Spanish Caribbean possessions in particular Havana. By June 6th the British army was ashore some miles to the East of Havana. By 13th one of the strongest bastions in the defence of the town, Fort Moro was under siege which progressed until the 30th of July when the 90th Foot with four companies of the 35th Foot managed to storm the forts now ruptured defences. The Garrison some seven hundred were overcome by the five hundred storming party at the cost of  45 officers and men, the Spanish defenders loosing 370.

With Fort Moro in British hands and the combined batteries of the army and the fleet opening fire on the 11th  of August the Governor surrendered.

During the actions in Havana the 35th Regiment of Foot lost 21 all ranks killed 28 wounded while 17 died of disease, the later being just a foretaste of the toll British regiments would pay for service in that part of the world.

Peace was signed on 10th February 1763 and the 35th Regiment of Foot found itself shipped to Pensacola in Florida which Spain had exchange with Britain for Havana under the peace treaty. Here suffering the ravages of disease the Regiment stayed and died for the next two years By late 1765 the 35th Regiment of Foot or rather the 40 or so left out of 1000(?) men who had landed in Florida rerturned to England.

For the next ten years the Regiment found itself either in England or Ireland but in 1775 another war in America had surfaced. It was something of an ironic twist of fate that one of the Regiments--the 35th, was again to be one of the first to be sent to America, this time to fight the same people it had fought and suffered so much with, and for, but that's another story.