After the Second World War the British Army had fourteen infantry depots, each bearing a letter.

At the same time the Middlesex Regiment was transferred to the Home Counties Brigade, with the remaining regiments each being reduced to a single battalion.

The Brigade combined the depots of:[2] Under the Defence Review announced in July 1957, the infantry of the line was reorganised, and on 1 April 1958, the 1st Battalion Oxfordshire and Buckinghamshire Light Infantry was transferred from the Light Infantry Brigade to the Green Jackets Brigade.

The regiment was subsequently renamed as the 1st Green Jackets (43rd and 52nd) on 7 November 1958.

[3] The remaining two regiments were also renamed as the 2nd and 3rd Green Jackets on 7 November, so that the Brigade contained three battalions: On 1 January 1966, the three regiments were amalgamated into a single three battalion "large regiment" called the Royal Green Jackets.