On the 23rd April 1968 the Royal Regiment of Fusiliers was formed from the four English Fusilier regiments:

* The Royal Northumberland Fusiliers (The 5th of Foot)
* The Royal Warwickshire Fusiliers (The 6th of Foot)
* The Royal Fusiliers (City of London Regiment) (The 7th of Foot)
* The Lancashire Fusiliers (The 20th of Foot)

These regiments were steeped in history and traditions which have been retained by the Regiment today.

On formation, the Regiment consisted of four regular battalions, one volunteer battalion covering the four Regimental areas, and the Depot. Due to a series of Government Defence Reviews, ' Options for Change' and the recent 'Strategic Defence Review' the Regiment now comprises of two regular battalions and a number of Territorial Army companies located in the four regimental areas.

The regular battalions are:

* 1st Battalion, The Royal Regiment of Fusiliers
* 2nd Battalion, The Royal Regiment of Fusiliers