The King Edward's Horse were embodied 4th August 1914 in Chelsea where they were training with the 4th Cavalry Brigade. They were mobilised to Watford and moved to Bishop Storford in March 1915.

Figure 16: No. 3 Troop of ‘C’ Squadron at Gammons Farm, Watford in 1914 the captioning ‘en route for Berlin’ by the Troopers capturing the optimism and excitement of the early stages of the Great War (The King Edward’s Horse Senior and Junior Comrades’ Association Annual Bulletin. 19: 16, 1952).

Figures 17 and 18: Front and rear of a postcard depicting a group of King Edward's Horse at Garston, Watford on 14 December 1914. The sender of the card is Private John Callum Newlans Eastick and he wrote on the back of the card that he wasn't actually in the postcard as these were Troopers of 'C' Squadron who had among their ranks many former members of the original Cambridge and Oxford university troops of the King Edward's Horse. He also notes that all leave had been cancelled and he thinks it unlikely that he will be home for Christmas.
‘C’ Squadron (Australasian) together with Regimental HQ landed at Havre on 22nd April 1915 and initially joined the 47th (London) Division and then joined IV Corps Cavalry Regiment on 1st June 1916