The 1st Battalion landed at Le Havre, as line of communication troops, in August 1914 for service on the Western Front.

The 2nd Battalion landed at Le Havre as part of the 23rd Brigade in the 8th Division in November 1914 also for service on the Western Front.

The 3rd Battalion landed at Le Havre aspart of the 85th Brigade in the 28th Division in January 1915 for service on the Western Front before moving to Egypt in October 1915 and to Salonika in December 1915.

The 4th Battalion land at Boulogne-sur-Mer as part of the 8th Brigade in 3rd Division in August 1914 for service on the Western Front.
Some 400 men of the 4th Battalion were killed at the Battle of Mons later that month.
The 1st Battalion landed at Le Havre, as line of communication troops, in August 1914 for service on the Western Front.
The 2nd Battalion landed at Le Havre as part of the 23rd Brigade in the 8th Division in November 1914 also for service on the Western Front.
The 3rd Battalion landed at Le Havre aspart of the 85th Brigade in the 28th Division in January 1915 for service on the Western Front before moving to Egypt in October 1915 and to Salonika in December 1915.
The 4th Battalion land at Boulogne-sur-Mer as part of the 8th Brigade in 3rd Division in August 1914 for service on the Western Front. Some 400 men of the 4th Battalion were killed at the Battle of Mons later that month.
Middlesex Regiment