The whole army now advanced towards the Soane. The advance was covered by Colonel Champion with a detachment and four guns, who was attacked by large bodies of the enemy’s horse near Mooneah, at the junction of the Soane and Ganges, whom they beat off, and Colonel Munro coming up crossed the river immediately. The march to Arrah was a good deal harassed, and the guns frequently called into play to keep off the enemy’s horse.
At Buxar, on the 22nd October, they came up with the enemy, and on the following morning, about 8 o’clock, the enemy marched out to attack them. The British were drawn up in line with their guns, twenty field-pieces and seventy-one artillerymen of the 1st company, on the flanks of battalions. The enemy were repulsed, and about 12 o’clock they retired slowly, blowing up their tumbrils of ammunition. One hundred and thirty-three pieces of artillery, mostly with English carriages, and among them twenty-seven which had been lost the previous year at Patna, were the trophies on this occasion.
In the acknowledgment of this victory, written by Mr. Vansittart and his council, 16th November, 1764, to Munro, he was requested “to return thanks to the field-officers and commandant of artillery (Major Jennings) for their care and diligence in preserving the disposition for attack, and taking every advantage over the enemy.”
Captain Winwood and Lieutenant Duff of the artillery are mentioned “as meriting particular notice, and having gained great honour.”
A detachment of two battalions failed in November, in an attempt to take the fortress of Chunar; in January, 1765, however, Sir Robert Fletcher succeeded in gaining possession of it, and in February he breached Allahabad, when the garrison evacuated it. On the 3rd May a battle was fought near Korah,[[10]] against the vizier, aided by the Mahrattas; these latter were quickly dispersed by the fire of the artillery, and they separated from the vizier and retired towards the Jumna with precipitation. These events placed the southern part of the Dooab under British rule.
The army was this year (1765) divided into three brigades, and the companies of artillery attached one to each, while the remaining company was stationed in Fort William.[[11]]
| 1st Brigade | 1st Company | Monghyr. |
| 2nd ditto | 2nd ditto | Allahabad. |
| 3rd ditto | 4th ditto | Bankipore. |
| Ditto | 3rd ditto | Fort William. |
In addition to the guns with the park, each battalion of infantry was equipped with two six-pounders or three-pounders, worked by the men of the regiment, assisted by native officers and lascars from the artillery.
A major was this year allowed to the artillery, to command the corps, and a practice-ground formed at Sulkeah.
In 1766 the alarming mutiny on the part of the officers of the army, caused by the reduction of allowances, broke out, and was only suppressed by the firmness and decision of Lord Clive and Colonel Smith. The part taken in this by artillery officers cannot now be fully traced; but Captain Duff, Captain-Lieutenant Clifton, and Lieutenant Black, appear to have taken prominent parts. Many, we learn from the army-list, were dismissed about that time, most probably on account of the mutiny; others resigned. Nearly all, in every branch of the army, were, however, restored to the service, and placed in the position they would have held, had they remained in it.