The Royal Welch Fusiliers was an Infantry Battalion that would have had an MG Section as part of its Battalion Headquarters. These weapons would have been brigaded when the Machine Gun Corps was formed in 1915. The guns, and crews, would have been formed into a Machine Gun Company.
During the Great War, the Battalions were distributed as follows:
The 1st Battalion was part of the 22nd Brigade, attached to the 7th Division. Its MG Section was transferred on 24 February 1916 to form the 22nd Bde. MG Coy..
As a unit of the 7th Infantry Division, its MG Section will have taken part in the following battles and engagements.
| 1914 | |
| 09 and 10 October | Antwerp Operations [IV. Corps]. |
| 19 October to 05 November | BATTLES OF YPRES |
| 21 to 24 October | Battle of Langemarck [IV. Corps]. |
| 29 to 31 October | Battle of Gheluvelt [I. Corps]. |
| 18 December | Rouges Banes - Well Farm Attack [IV. Corps]. |
| 1915 | |
| 10 to 13 March | Battle of Neuve Chappelle [IV. Corps, First Army]. |
| 09 May | Battle of Aubers Ridge [In reserve, IV. Corps, First Army]. |
| 15 to 19 May | Battle of Festubert [I. Corps, First Army]. |
| 15 and 16 June | Givenchy [IV. Corps]. |
| 25 September and 08 October | Battle of Loos [I. Corps, First Army]. |
The 10th Battalion was part of the 76th Brigade attached to the 3rd Division. It's MG Section was transferred by 13 April 1916 to form the 76th Bde. MG Coy..
As a unit of the 3rd Infantry Division, it will have taken part in the following battles and engagements.
| 1914 | |
| 23 and 24 August | Battle of Mons [II. Corps]. |
| 24 August to 05 September | RETREAT FROM MONS [II. Corps]. |
| 26 August | Battle of le Cateau [II. Corps]. |
| 06 to 09 September | Battle of the Marne [II. Corps]. |
| 13 to 20 September | BATTLE OF THE AISNE [II. Corps]. |
| 13 September | Passage of the Aisne. |
| 20 September | Actions on the Aisne Heights. |
| 10 October to 02 November | Battle of La Bassee [II. Corps] (3rd Division (less 8th Brigade, left under Indian Corps) was relieved on 29 October) |
| 05 to 21 November | BATTLES OF YPRES [I. Corps]. |
| 11 November | Battle of Nonne Bosschen [I. Corps]. (In this battle the 3rd Division was formed of 7th, 9th, and 15th Brigades). |
| 14 December | Attack on Wytschaete. |
| 1915 | |
| 16 June | First Attack on Bellewaarde [V. Corps, Second Army]. |
| 19 July | Hooge [V. Corps, Second Army]. |
| 25 September | Second Attack on Bellewaarde [V. Corps, Second Army]. |
In 1922, the Machine Gun Corps was disbanded and the guns returned to the Infantry Battalion as a Machine Gun Platoon and then formed as a Machine Gun Company in the early 1930s.
This remained until the formation of Divisional Machine Gun Battalions in 1936 where guns were brigaded once again.
Upon the disbandment of Divisional Machine Gun Battalions in the post-WW2 restructure of the British Army, the Vickers Machine Gun assest reverted to individual Battalions as part of the Support Company as a Machine Gun Platoon.