[1] In the first half of the 19th century the command included the counties of Essex, Suffolk, Norfolk, Cambridgeshire, Huntingdonshire and Hertfordshire.

[3] Disbanded after the Napoleonic Wars, the Eastern District Command was re-created in 1866[4][5] and was based at Flagstaff House in Colchester.

As outlined in a paper published in 1903, IV Corps was to be formed in a reconstituted Eastern Command, with HQ at London.

[14] At the outbreak of the Second World War, the headquarters was again located at Horse Guards,[15] but by October 1939 it had moved to Hounslow Barracks.

[16] At that time Regular Troops reporting to the Command included 4th Infantry Division.

[20] After the War the command headquarters moved back to Cavalry Barracks, Hounslow in north London.

[25] In 1954 a single-storey blockhouse was built at Wilton Park in Beaconsfield, to provide a protected Eastern Command headquarters for use in the event of war; however in 1957 this provision was superseded by plans for Regional Seats of Government.