The first week in July was spent by the 3rd Battalion at Labazeque, and on the 7th it proceeded to Ransart, where it relieved the 10th Battalion Argyll and Sutherland Highlanders in the right sector of the front occupied by the Guards Division.
Two companies were placed in the front line with one company in support and one in reserve, and officers' patrols were sent out every night from dusk to dawn, but there was no movement on the part of the enemy. On the 10th the Battalion moved back into support, and on the 15th into Divisional Reserve, where it remained for three days. From the 19th to the 24th the Battalion went up again into the front trenches, where the work consisted of improving the line by laying down duckboards and digging sumps and latrines. Fifteen officers, 30 sergeants, and 55 corporals from the American Army were attached to the Battalion, and were distributed between the four companies and Battalion Headquarters. Lieutenant S. G. Fairbairn, Second Lieutenant H. P. Gordon, and Second Lieutenant S. Calvocoressi arrived during this tour of duty in the trenches, and on the 25th the Battalion retired into support, where more officers and men of the American Army were attached for instruction. On the 30th the Battalion moved back into Divisional Reserve.
Aug.
After four days in reserve the Battalion went up into the front line near Adinfer, where it remained for a week carrying out inter-company relief. In this part of the line patrols were sent out every night, and a company from the 320th Regiment of the United States Army, which accompanied the Battalion, supplied a certain number of men for this purpose. On the 6th Second Lieutenant R. P. Papillon when out on patrol duty, encountered a German patrol in Observation Trench, and after severely wounding one of the enemy, succeeded in bringing back an identification mark. The Higher Command, however, required further information, and accordingly a special patrol was sent out on the night of the 10th. Captain Churchill, whose great experience in all kinds of incursions into the enemy's line rendered him eminently fitted for the task, was sent from the Brigade Headquarters, to take charge of the party, which consisted of Second Lieutenant de Reuter and seven men. A covering-party composed of thirteen men, under the command of Sergeant Birtles, accompanied the raiders. Hardly had the patrol started, when a shell fell among them, wounding one man, who had to be carried back to the trenches. Following the German outpost line, which consisted of small adjacent rifle-pits, but which showed no sign of frequent occupation, the patrol came on the German wire. This formidable obstacle consisted of barbed wire in concertina shape, staked to the ground, with strands running through it. After a careful search a gap was found, and through this the patrol went. After following the track for about forty yards a German sentry was seen. The patrol stood still, and the sentry walked away unconscious of its presence. Soon afterwards some more of the enemy were seen moving round to the left of the track. They were evidently suspicious, as they only whispered. Three of them came crawling slowly towards the patrol. In dead silence the patrol waited, but the Germans turned back, and apparently reported all clear, for thirty to forty more Germans appeared, and stood up close together. They came to within thirty yards of the patrol, when Lieutenant de Reuter gave the order "rapid fire." Several of them were seen to fall. It was now merely a question whether the Germans would attempt to capture the patrol or not, but they contented themselves with firing and throwing a few bombs, while Véry lights were sent up. Captain Churchill therefore retired unmolested through the wire, having only had one man wounded.
On the 10th Second Lieutenant de Geijer and twenty other ranks raided a German post under an artillery barrage. At 3.15 A.M. a Stokes mortar barrage supplemented the artillery bombardment, and the raiding party in two groups, under Second Lieutenant de Geijer and Sergeant Butler respectively, rushed the enemy's post. The Germans had, however, abandoned the post just before the raid took place, and the last two were seen to run from it, as the raiders started. Much valuable information was gained, as the Germans left everything behind, but, with the exception of Lieutenant de Geijer who was slightly wounded, there were no casualties.
On the 11th the Battalion was relieved by the 1st Battalion Coldstream, and went into support, moving on four days later to billets in Saulty, where it remained until the 20th.
On the 20th the Battalion "debussed" between Blaireville and Heudecourt, and took up its assembly positions east and south-east of Boiry.
The orders General Sergison-Brooke received were to attack Moyenneville in conjunction with the Second and Third Divisions on the right. In the operation orders which he issued the capture of the first two objectives was to be carried out by the 1st Battalion Scots Guards on the right, and by the 1st Battalion Coldstream on the left. The 3rd Battalion Grenadiers was then to pass through, and secure the third objective. Eight tanks would co-operate in front of each Battalion.
The following officers of the 3rd Battalion took part in these operations:
| Lieut.-Colonel A. F. A. N. Thorne, D.S.O. | Commanding Officer. |
| Lieut. E. N. de Geijer | Intelligence Officer. |
| Capt. E. R. M. Fryer, M.C. | No. 1 Company. |
| Lieut. C. C. Carstairs, M.C. | " " |
| Lieut. R. Delacombe | " " |
| 2nd Lieut. E. L. F. Clough-Taylor | " " |
| Lieut. A. H. S. Adair | No. 2 Company. |
| Lieut. S. G. Fairbairn | " " |
| Lieut. J. Chapman | " " |
| Capt. N. C. Tufnell | No. 3 Company. |
| Lieut. C. Clifton Brown | " " |
| 2nd Lieut. A. D. Cooper | " " |
| Capt. G. F. R. Hirst | No. 4 Company. |
| Lieut. R. G. West | " " |
| 2nd Lieut. R. C. G. de Reuter | " " |
| 2nd Lieut. R. P. Papillon | " " |
| Lieut. Graff, U.S.A.M.O.R.C. | Medical Officer. |
| Capt. the Rev. S. Phillimore, M.C. | Chaplain. |