Prominent battles
He was present at the sieges and storming of Ciudad Rodrigo and Badajoz. As soon as Badajoz was taken he was ordered to join the sixth division, under Sir H. Clinton, at Albuera, and take charge of the quartermaster-general's department. On the advance of the army into Spain in 1812, Captain Bainbrigge, who had examined the country which was to become the scene of operations, was brought to headquarters. He was present at the siege of the forts of Salamanca, at the affairs of Costillegos and Costrejon, and at the crossing of the Guarena, his duties being to carry orders and make sketches of the country and positions. On one occasion, being with Lord Wellington on high ground on the right bank of the Tormes watching the enemy crossing the river at Huerta, his lordship suddenly told him to ride in the direction which he pointed out on the other side of the Tormes, to examine the ground and make a sketch of it. He accordingly rode down to the ford of Santa Marta, and crossing Over to the ground between the ford and the two Arapile hills, a distance of about three miles, made his sketch while the enemy's skirmishers were in immediate proximity, and brought back a plan in about two hours and a half. It was on part of this ground that the battle of Salamanca was afterwards fought. On another occasion he was ordered to conduct a column of the army then at Pareda, three leagues off, through a difficult country and in face of the enemy to Vallesa. He did so successfully, and brought the column in the midst of the night safely to its destination. On the day of the battle of Salamanca he was constantly with Lord Wellington, and at a critical moment he carried the order for the advance of General Leith's division.
After this decisive victory he accompanied the army in the advance to Madrid, and from thence to Valladolid and Burgos. He was present at part of the siege of Burgos, and soon after was appointed permanent assistant quartermaster-general with the rank of major. In the retreat from Burgos he rendered very important services through his knowledge of the country, which was considered of so much value that Sir H. Clinton asked for his return to the sixth division, but it was decided that he should remain at headquarters. Major Bainbrigge continued to hold the same position till the end of the war in 1814, and surveyed and sketched the country through which the army passed till it entered France. He was present at the battles of Vittoria and Pyrenees, at the last siege of San Sebastian, and at the battles of Nive and Toulouse. Rewards and distinctions were not lavishly bestowed in those days, and, as Major Bainbrigge had not been in action as the head of his department with a division, but under his seniors at headquarters, he did not receive the gold medal, and could not become a companion of the Bath. Through some strange omission he was not recommended for brevet rank, but on 21 Jan. 1817 this was rectified, when he was promoted to the brevet rank of lieutenant-colonel.
In 1815 he applied for employment abroad, and joined the British army in its advance to Paris. When he returned home after the peace, he continued to hold the appointment of permanent assistant quartermaster-general until 1841, when he was made deputy quartermaster-general in Dublin. Having attained the rank of major-general, 9 Nov. 1846, he was appointed by the Duke of Wellington to the command of the Belfast district. In 1852 the duke selected him to command the forces in the island of Ceylon. During his stay in Ceylon his unremitting exertions for the welfare of the troops under his command made him beloved and respected by all classes, and his departure, when promoted to the rank of lieutenant-general on 20 June 1854, was much regretted.