Due to the increased demand for mobile units on the Western Front in 1918, six of the regiments were withdrawn from the division and sent to France in April. They were replaced by Indian cavalry regiments from the British Indian Army which meant that the complete break-up of the division was averted.
The "mounted" brigades were redesignated as "cavalry" brigades when the division was renamed as the 4th Cavalry Division. 6th Mounted Brigade / 10th Cavalry Brigade :
The brigade joined from the Imperial Mounted Division. 8th Mounted Brigade / 11th Cavalry Brigade :