Following the Battle of Mons the survivors retreated 150 miles southwest to Sainte Quentin (26 Aug), to Noyon (29 Aug) and Compiegne (30 Aug) and southeast of Paris (6 Sept)

6 Sept 1914-High water mark of German invasion of France.
"One of our men was killed, and Private Potter who was with him was wounded. The enemy treated him well and left him in our hands later in the day !"

7 Sept - Battle of Moncel (Now known as Le Montcel)
"2 Cavalry to guard the right flank of the division and to move forward."

*Comment in The Old Contemptibles
The pre-war believers in shock action, especially those who had welcomed the reintroduction of the lance in 1909 might have claimed their case vindicated, albeit briefly and on a much smaller scale than they had anticipated, by the action al Moncel on 7 September during the Battle of the Marne. The 9th Lancers, leading 2 Cavalry Brigade, had cleared the village of German cavalry patrols. Lt. Col. Campbell, accompanied by part of B Squadron, had halted on the outskirts when a German squadron of the 1st Guard
Dragoons, also armed with lances, charged his party at a canter in a single line. Campbell immediately led his 30 odd lancers into a gallop at the left half of the enemy line, and crashed into them. A melee followed, lance against lance, then the 9th broke through and wheeled back to Moncel to join another troop, having lost three killed and eight wounded, including Campbell himself, slightly, and his adjutant. The German squadron bore away but shortly afterwards charged a dismounted squadron of the 18th Hussars whose rapid rifle fire cost the dragoons two-thirds of their strength.

Earlier, on 24 August at Elouges, the 9th had used their rifles to good effect against German infantry, but later the same day an order to charge the flank of another infantry column with supporting artillery, undertaken against Campbell's tactical judgment, proved the fallacy of shock action. Galloping forward in columns of squadrons, the 9th only succeeded in spearing some scouts before being checked with heavy loss by the fire of six batteries.
By mid-October, when the Cavalry Corps was holding ground near Messines, rifles had entirely supplanted lances, as Capt. Grenfell, who had won the VC at Elouges, wrote: 'We have had five of the hardest days of the war in trenches repelling German attacks. I am afraid all the cavalry traditions are for ever ended, and we have become mounted infantry pure and simple, with very little mounted about it'.
Mounted infantry indeed they were on 28 October when they galloped forward by squadrons in open order under shell fire to dismount and hold a road with rifle fire, thereby providing a line behind which the remnants of a broken Indian battalion could reform. The combination of mobility and firepower had blocked a sudden gap through which the Germans would otherwise have poured.
Three days later they were infantry pure and simple, temporarily under command of 1 Cavalry Brigade and holding an exposed salient position in front of Messines with only some 150 rifles against 12 German battalions attacking on both flanks, supported by a heavy bombardment. Against such overwhelming odds the 9ths three squadrons were forced back unti1 their original line formed three sides of a square. At one point, being attacked from both sides, Grenfell ordered the even numbers of his squadron to face one way, the odd numbers the other. Having evacuated one trench as no longer tenable, he heard firing still coming from one end of it. He ran back and found Cpl. Seaton and one man with a machine-gun still engaging the Germans, only 30 yards away. Despite the enemy's proximity they managed to rejoin the squadron, Grenfell covering the machine-gunners with his revolver.
By the time the regiment had driven back to Messines three-quarters of the officers and a third of the men were casualties. The German pressure was unrelenting, and the 9th must have been overrun had they not been ordered to retire through the 11th Hussars, who had just formed a support line behind them .

21 Sept - First whole non-fighting day since Mons.
18 Hussars thereafter fought northeast including the battle of The Marne and The Aisne, and eventually in mid October probing at Armentiers, Ploegsteert, Messines and Wytschaete.
11 Nov - Left horses at Hooge (near Ypres) on Zonnebeke Road and fought in trenches at Zillebeke
18 Nov - Marched to Berthen and billeted in allocated farms till 23 Feb 1915. On Christmas day there was no fighting.

1915
23 Feb - At Zillebecke digging and building trenches
23 Apr - Relieved French following the first gas attack at Elverdinghe
9 May - On foot Halte (near Ypres) on Menin Road
10 May - At Hill 60
13 May - Battle at Wielotje 21 dead, 109 wounded and 24 unaccounted.
23/24 May - In early hours gassed at Hooge. Down to 100 men; reinforced to 280. Now on dismounted duties 'digging parties' and 'pioneer companies'.
15 July - At Rubrouck in allocated farms for the summer. Generally a very quiet time.
23 Sept - At St Omer
3 Oct - At Ligny Les Aire and Wavrans-sur-l'Aa

1916
Operating in Vermelle, Noyelles, La Bourse, Querrieu digging and pioneering
6 Sept - Carnoy Valley in reserve. Very severe wet and frosty winter with snow and fog.
Assisted 1st Army and Canadians in Vimy Ridge attack while at Athies and Fressin. Thereafter rehabilitating horses after Vimy Ridge excursions.

1917
10 April -Vimy Ridge attack
17 Nov -At Cambrai - Bourlon Woods

1918
Jan - At Le Verquier & Doingt
21 Mar - German offensive began - retreated to Presle to dig in.
24 Mar - At Cappy
27 Mar- At Mericourt - Germans attacked across Somme valley. Repulsed attacks in area until 9 April near Amiens.
30 April - 31 officers, 512 troops and 557 horses for training.
Aug - preparation for counter offensive
20 Aug - Fillievres
7 Oct - Hesbecourt and Nauroy
9 Oct - Maretz
10 Oct - Premy
11/12 Oct - Maretz
13 Oct - Tertry
6 Nov - Crevecoeur
7 Nov- Ferin
8 Nov - Mons en Pevele
10 Nov - Fontenoy (25 miles southwest of Liege)
11 Nov -At Bascelles - news of Armistice - "Unsaddled for night"
1 Dec - Entered Germany; 37 officers and 591 men at Konzen

1919
29 Mar 1919-Antwerp to Southampton 13 officers, 298 men and 169 horses
18 Nov - On SS Kildonan from Devonport to India