Threat of French invasion led to the formation of The Volunteer Force in 1859. In 1883 The 19th Middlesex Rifle Volunteer Corps and the 46th Corps became respectively The 1st and 2nd Volunteer Battalions of Royal Fusiliers (The City of London Regiment) and adopted the dress and traditions of the arent regiment.

In 1890 two more Battalions were formed: these four battalions were increased to 19 during The Great War and fought in France, Flanders, Gallipoli and Egypt. The traditions and customs of the former Royal Fusilier Volunteers are carried on today by 'C' (City of London Fusiliers) Company, The London Regiment.