French Sixth Army 25–26 September At on 25 September, the Sixth Army attacked with seven divisions. The XXXIII Corps attacked along both sides of the Somme and made very slow progress towards Feuillaucourt; further north VI Corps was stopped south-east of Bouchavesnes and V Corps was stopped short of the village. German artillery on Mont St Quentin swept the southern part of the Sixth Army front and at Inferno Trench, dug on a reverse-slope,
strafing by German aircraft and fire from machine-guns hidden in shell-holes, stopped the French advance after . The
10th Division managed a costly advance close to the edge of St Pierre Vaast Wood on 26 and 27 September. The 42nd Division of XXXII Corps captured Rancourt, then occupied Frégicourt shortly after midnight on 26 September, before reaching the west end of St Pierre Vaast Wood, where its advance was stopped by massed machine-gun fire from German positions hidden in the edge of the wood. A combined attack by the
2nd Division and the British 56th (1/1st London) Division took Combles, before all of the German garrison escaped, after I Corps had been held up for most of the day by German machine-gun fire south-east of the village. French patrols got into Combles overnight and by dawn on 26 September, the south-east of the town had been occupied and taken. German troops retreating east were "routed" in the direction of Haïe Wood by machine-gun fire. Much German equipment was captured, including two million rounds of ammunition, shells and many hand-grenades. I Corps then advanced a short distance east of the Frégicourt–Le Transloy road. A renewal of the attack towards the German defences between Haie Wood and St Pierre Vaast Wood was delayed until Mutton Trench on the left flank was attacked at by the British. The French attack managed to advance on the flanks but was held up in the centre.
Fourth Army 25 September XIV Corps attacked on the right with the 56th (1/1st London) Division next to the French Sixth Army, in co-operation with the French 2nd Division, with two battalions of the 168th Brigade while the other two on the right flank contained the Germans in Bouleaux Wood and the western defences of Combles. The brigade quickly advanced round the north of the wood, despite resistance in the embankment of the tramlines and then sent patrols towards Combles. Artillery observers reported small groups of German soldiers moving eastwards from the village. By midnight all three brigades had moved forward and at British and French troops met; by dawn a patrol met French soldiers east of the town, the 56th (1/1st London) Division line being consolidated east of Combles, with the Germans beyond in Mutton Trench. A further attack was planned with tank support then cancelled when the tanks failed to appear. North of the 56th (1/1st London) Division, the 95th Brigade of the 5th Division was delayed by enfilade machine-gun fire from the embankment north of the tram line and a strong point on the Ginchy–Morval road until bombed from the north. On the left the 15th Brigade followed the creeping barrage closely down into the valley, over-running and taking prisoner numerous Germans. The 95th Brigade resumed its advance up the far slope and rushed the German trench running south from Morval, as the 15th Brigade overran the trench further north, west of the village, taking many more prisoners. After another halt to reorganise, the village was occupied by the 15th Brigade at . The final objective from the windmill, south to the 56th (1/1st London) Division area, was consolidated by nightfall. Several weak German counter-attacks were defeated and the 95th Brigade began working its way southward, towards the French at Frégicourt. The 6th Division attacked from north of Morval, to the road through the middle of Lesbœufs, on the left of the 5th Division. The first objective was taken by a battalion of the 16th Brigade on the right and two battalions of the 18th Brigade on the left. The final objective east of the Morval–Lesbœufs road was captured by two battalions leapfrogging through on the right and one on the left, to clear the south end of Lesbœufs, where the Guards Division was met as it occupied the north end. The attack benefitted from good weather, which led to a good preliminary bombardment and an accurate creeping barrage, being taken. The 5th and 6th divisions consolidated on spurs east and north-east of Morval. At the adjoining brigades advanced another east of Morval and also put posts on a line from Morval Mill north to Lesbœufs. The Guards Division attacked with two brigades in line, which advanced in waves apart. A German counter-barrage began on the Guards Division front, within a minute of the infantry advancing but the leading waves moved fast enough to avoid the bombardment. The foremost battalions of the
1st Guards Brigade found little opposition, apart from uncut wire, which was cut by the officers, while the men provided covering fire and fire from dug-outs along a sunken road on the extreme right flank. The first objective was rushed at and captured by The advance to the next objective took ten minutes, against "slight" opposition and the advance to the final objective was conducted against little resistance, the right-hand brigade digging-in on the east side of Lesbœufs by On the left flank, the
3rd Guards Brigade reached the first objective on the right but was delayed on the left until by Germans in a trench which had been missed by the artillery bombardment, before reaching the first objective. The neighbouring brigade of the 21st Division had been held up by uncut wire, so a defensive flank was formed; the rest of the brigade pressed on, arriving at the second objective at and the final objective at Touch was gained with the 6th Division north of Lesbœufs; a further advance in the evening was postponed due to the vulnerable northern flank, although the disarray seen among the German defenders further south, led local commanders to call for cavalry to exploit the "rout" they believed was occurring south of Gueudecourt, as British artillery inflicted many casualties on retreating parties of Germans. To the north of XIV Corps, the 21st Division attacked on the right flank of XV Corps. Two battalions of the 64th Brigade on the right were held up by uncut wire at Gird Trench (), except for some troops who advanced on the extreme right, in company with the 3rd Guards Brigade. A reserve battalion moved forward to attack the second objective but got no further than the British front trench, due to German artillery fire. The 110th Brigade on the left of the 21st Division took Goat Trench and then machine-gun fire from the right held them up, before the leading battalions reached Gird Trench. Eventually a defensive flank was formed, facing south in part of the Ginchy–Gueudecourt road and a small number of troops got into Gird Trench and gained touch with the
55th (West Lancashire) Division, which had attacked with 165th Brigade and taken Gird Trench early in the afternoon, then gained a foothold in a sunken road between Gird Trench and Gueudecourt at , linking with the 21st Division on the right and the
New Zealand Division on the left. The 1st New Zealand Brigade was to form a defensive flank either side of Goose Alley, which ran from Flers Trench to the Gird Trenches, facing north-west towards Eaucourt l'Abbaye. The leading waves kept very close to the creeping barrage, advancing quickly against sparse German artillery fire and unusually feeble resistance from German infantry; a battalion headquarters was captured and a defensive flank was formed along Goose Alley to Gird Trench. Touch was gained with the 1st Division (III Corps) to the north in Flers Support Trench and later the 55th (West Lancashire) Division was met beyond Factory Corner to the south. In III Corps the 1st Division took of Flers Trench and the attacking brigade of the
50th (Northumbrian) Division, remained in posts beyond no man's land, built the previous night. To the west the 68th Brigade of the 23rd Division attacked 26th Avenue with two tanks attached. One tank crossed the crest and attracted so much German artillery fire that the advance of the brigade was stopped. An attempt to bomb forward from west of Martinpuich Mill also failed.
26 September In XIV Corps the 56th (1/1st London) Division probed towards Combles, arriving within by dawn, as other troops advanced into Bouleaux Wood, after seeing rockets fired at The 167th Brigade linked with the 5th Division south of Morval and met French patrols near the light railway at Troops moved forward and consolidated a new line about east of Combles, linking with the French on the right. An attack on Mutton Trench by the 168th Brigade was called off, after five tanks due to operate in support were ditched. XV Corps captured Gird Trench () and Gueudecourt when a fresh battalion of the 21st Division and a tank advanced up Pilgrim's Way at and bombed down Gird Trench to the Guards Division. Infantry and cavalry patrols entered Gueudecourt and the high ground to the north. German artillery fire revived during the morning, forcing the Guards Division to consolidate as quickly as possible. A cavalry squadron tried to get forward near Gueudecourt but found the front of advance too narrow to manoeuvre. Infantry probes beyond Lesbœufs, made little progress against a line of German machine-gun posts, on the higher ground west of Le Transloy. More cavalry advanced from Mametz and dismounted under fire at , to enter Gueudecourt from the south-west. The 110th Brigade (attached from the 37th Division) moved forward slowly and reached the village late in the afternoon. The 64th Brigade (21st Division) continued the advance with two battalions, to just short of the Gueudecourt–Le Transloy road, where a battalion from the 62nd Brigade passed through to the road and linked with the Guards Division at the junction with the Lesbœufs road. The 1st Division and the 50th (Northumbrian) Division of III Corps made a night attack on a new German trench at , the 1st Division was stopped by machine-gun fire and the 50th (Northumbrian) Division captured the west end, then bombed up Crescent Alley to Spence Trench.
27 September XV Corps attacked with the 55th (West Lancashire) Division, which took Gird Trench and Goose Alley with a battalion of the 164th Brigade at The 1st Infantry Brigade of the New Zealand Division linked with the 55th (West Lancashire) Division in Gird Support Trench on the Ligny road, having taken then dug in on a reverse slope further forward, when it was found that Gird Support Trench was nearly obliterated. The New Zealand battalion in the centre advanced except on the left, where it was held up by uncut wire and the left battalion lost three companies to machine-gun fire beyond the road from Factory Corner to Eaucourt l'Abbaye. The fourth company established posts up Goose Alley, while the Germans managed to hold on to the junction of the Alley and Gird Trench (). In III Corps the 1st Division captured most of the rest of Flers Switch Trench and was relieved by the
47th (1/2nd London) Division that night. The 50th (Northumbrian) Division patrolled and established posts from Flers Trench (). The 23rd Division on the northern flank, took part of 26th Avenue near Spence Trench and linked with the Canadians of the Reserve Army on the Albert–Bapaume road.
28–30 September The 56th (1/1st London) Division was relieved by the 20th (Light) Division and 6th Division as the Morval area was handed over to the French Sixth Army. A XV Corps attack by the New Zealand Division was cancelled, because the un-captured part of Gird Trench was found to overlook the objective at Goose Alley. The junction of both Gird trenches and Goose Alley were found to be in a dip, which had not been seen on aerial photographs or marked on maps. The Germans were on the north and west slopes and the New Zealanders had reached the south and part of the western edges, which gave a commanding view of the German positions, making another attack redundant. The 41st Division relieved the 55th (West Lancashire) Division, III Corps consolidated and the left of the 23rd Division advanced with the Canadians of the Reserve Army; an attempt on Destremont Farm failed against a vigorous German defence, using many machine-guns and bombs. The 6th Division and the Guards Division of XIV Corps, occupied empty German trenches beyond Lesbœufs. An attempt by a company to close a gap north of the Lesbœufs–Le Transloy road, was stopped by more massed German machine-gun fire, before the Guards Division was relieved by the reserve brigade of the 56th (1/1st London) Division on the night of 30 September. In the III Corps area, on the northern flank of the Fourth Army, the 23rd Division attacked Destremont Farm at then linked with the 3rd Canadian Division on the army boundary. The 141st Brigade from the 47th (1/2nd London) Division relieved the 1st Division on the night of and pressed the Germans back beyond the Flers Switch Line at the second attempt. The New Zealand Division advanced on the right, also in preparation for the attack on Eaucourt l'Abbaye intended for 1 October. A German army order was found by New Zealand troops in the Gird Trenches (), which gave away the positions of German reserves in the area.
Air operations Monday 25 September, was bright and cloudless, with a ground haze but reports from observers in contact patrol aircraft were notably accurate, as the infantry advanced to their objectives on the Fourth Army front, from Morval to Gueudecourt and around Flers. Observers in reconnaissance aircraft located artillery batteries; engaged and by zone calls. At observers watched the advance to the final objective and after twenty-one minutes, almost all of it was reported captured. A map compiled from air reports was later shown to be more accurate than infantry progress reports. The ground not taken near Morval fell in the evening, completing the capture of the ground on the main ridge, making Combles untenable, although British balloon observers were able to see that the French advance from the south had been delayed. There was extensive German air activity during the day but most aircraft flew above , which few British aircraft could reach. German air operations had little effect on the British corps aircraft, which made contact patrols and artillery observation flights. Four German aircraft were shot down and others damaged for no loss but the superior speed of the newer German aeroplanes, allowed them to break off at will. Lagnicourt aerodrome was attacked by two British squadrons, causing damage to hangars and parked aircraft and a German headquarters was bombed at Manancourt. On 26 September, at an aircraft directed a bombardment on Gird Trench () then infantry bombed down the trench southwards; a tank advanced to the trench at and drove along with the infantry. After the defenders were forced back to within of the Guards Division, when the aircraft called for artillery fire until the tank and infantry arrived. The aircraft observer stopped the artillery and the aircraft strafed the Germans in the trench, causing to surrender, for a British loss of five casualties. The capture of Gird Trench opened the way into Gueudecourt and beyond by evening. Air reconnaissance around midday, established the position of British and French positions around Combles.
German 1st Army 25 September Anglo-French attacks had been expected on 23 September, rather than 25 September and the timing of the attack for the afternoon, also wrong-footed some of the defenders. The
51st Reserve Division and the
52nd Reserve Division of the
XXVI Reserve Corps were quickly pushed back, part of the 236th Reserve Regiment being "destroyed" at the tram line north of Bouleaux Wood. Parts of the 235th Reserve Regiment west of Combles and the 234th Reserve Regiment in the village, were threatened with encirclement by the British from the north and the French in the south. A battalion of the 239th Reserve Regiment of the 52nd Reserve Division was cut off in Morval and part of the regiment was overwhelmed north of the village near Lesbœufs. The rest of Lesbœufs, held by the 240th Reserve Regiment from the same division fell easily. Parts of the 51st and 52nd Reserve divisions counter-attacked Morval but were only able to advance a short distance and cover the withdrawal of their artillery, eventually forming new a line along the Le Transloy road east of Morval. The 238th Reserve Regiment, on the right of the 52nd Reserve Division and the I Battalion of the neighbouring 6th Bavarian Regiment, on the left flank of the
6th Bavarian Division in the
III Bavarian Corps area, were able to hold much of (Gird Trench) and Gueudecourt, because some of the defending machine-guns had survived the British bombardment, having been withdrawn from the front-line and hidden in shell-holes. The 6th Bavarian Regiment further north, was pushed back from into the village and southwards into the I Battalion area. North of Gueudecourt, two German battalions were conducting a relief when the British attack began and a battalion headquarters was captured along with engineer stores, in the confusion. The
50th Reserve Division, defending Eaucourt l'Abbaye and Le Sars, was able to hold the southern end of its part of (Flers Trench), which had not been captured during the attacks of 15 September, against British attempts to bomb up it to the north-west, although forced back towards further west near Martinpuich, south of the Bapaume–Albert road.
26–28 September Bouchavesnes, Combles and Gueudecourt were lost, and rearguards withdrew from Combles to the (Gird Trench), although some of the 234th and 235th Reserve regiments were cut off, many being killed making for Haie Wood. Troops of the 8th Division, brought from north of the Bapaume–Albert road, to counter-attack from Thilloy towards Gueudecourt, were engaged by sixty British field guns, causing the German infantry to "flee" in the direction of Le Transloy. The British aircraft-artillery-tank-infantry attack on near Gueudecourt, led to many of the survivors of the 238th Reserve Regiment and a battalion of the 6th Bavarian Regiment being captured. The 50th Reserve Division was pushed further back towards Eaucourt l'Abbaye and Le Sars, as the 6th Bavarian Division took over the defence of the area; next day a Bavarian regiment was attacked, while being relieved by part of the
7th Reserve Division near and managed to hold its ground despite many casualties on both sides. ==Aftermath==