The Infantry was called upon to furnish a guard over the guns when parked, of twenty-five men. Six regiments of Dragoons, and twelve of Infantry of the Line, attended the camp. In 1727, the bad feeling, which had for some time existed between England and Spain, produced an open rupture. A force of 20,000 Spaniards besieged Gibraltar, opening their trenches on the 11th of February. By means of reinforcements from England and Minorca, the garrison was increased to 6000 men, and the bomb-vessels, which were sent from England and from other parts of the Mediterranean, rendered great assistance by enfilading the enemy's entrenchments. The siege was raised on the 23rd June, having only lasted four months, during which time the Spanish loss had been great, while that of the English had been inconsiderable. With the reinforcements from England had come some guns and stores, which assisted to make the fort more easily defended, its previous armament having been but indifferent. Colonel Jonas Watson commanded the Royal Artillery during the siege, having arrived for that purpose from England, accompanied by Captain Hughes and some young officers. The force under his command was two hundred in number. The only Artillery officer killed during the siege was Captain-Lieutenant Holman. In this the first defensive operation in which the Royal Regiment of Artillery was engaged—as in its first offensive at Vigo—it was on the successful side. And in both cases, it not merely represented, but it _was_ the principal arm of the English forces. The next event, the third proposed to be chronicled, took place in the same year. The train which it was deemed probable would have to proceed to Flanders was for field, not garrison service. It comprised four 6-pounders, twelve 3-pounders, and eight 1½-pounders. There were also six Royal mortars to be provided. A complete company of Artillery—with the exception of the cadets of the company, and nine of its bombardiers—attended the train, and 12 artificers and 22 pontoon-men, under a bridgemaster, were also ordered to accompany it. Conductors and commissaries were also included. Unless, however, it was proposed to enlist foreign Artillerymen into the British service, on landing in the Continent,—the staff of the train seems certainly excessive. For a total of 140 of all ranks—smaller than a single battery now—the following staff was detailed: 1 colonel, 1 comptroller, 1 paymaster, 1 adjutant, 1 chaplain, 1 quartermaster, 1 commissary of stores, 1 waggon master, 1 surgeon, 1 assistant-surgeon, 1 assistant provost-marshal, 1 kettledrummer and his coachman. These, then, were the three military events of most note during the twenty years ending in 1741; and they are certainly not such as to affect the peaceable reputation of the period. An unhappy expedition to the West Indies, under Lord Cathcart, was ordered in 1741, but as it was not completed until later, it can be alluded to more fully in a succeeding chapter.