The Essex Regiment was an infantry

Infantry

Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

 regiment

Regiment

A regiment is a major tactical military unit, composed of variable numbers of batteries, squadrons or battalions, commanded by a colonel or lieutenant colonel...

 of the British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 that saw active service from 1881 to 1958. Members of the regiment were recruited from across Essex county

Essex

Essex is a ceremonial and non-metropolitan county in the East region of England, and one of the home counties. It is located to the northeast of Greater London. It borders with Cambridgeshire and Suffolk to the north, Hertfordshire to the west, Kent to the South and London to the south west...

. Its lineage is continued by the Royal Anglian Regiment

Royal Anglian Regiment

The Royal Anglian Regiment is an infantry regiment of the British Army, part of the Queen's Division.The regiment was formed on 1 September 1964 as the first of the new large infantry regiments, through the amalgamation of the four regiments of the East Anglian Brigade.* 1st Battalion from the...

.
The Essex Regiment was formed in 1881 following the union of the 44th (East Essex) Regiment of Foot

44th Regiment of Foot

The 44th Regiment of Foot was an infantry regiment in the British Army. After 1782 the regiment became known as the 44th Regiment of Foot. The lineage of the 44th transferred to the Essex Regiment in 1881...

 and the 56th (West Essex) Regiment of Foot

56th Regiment of Foot

The 56th Regiment of Foot was an infantry regiment in the British Army, active from 1755 to 1881. It was originally raised in Northumbria as the 58th Regiment, and renumbered the 56th the following year when two senior regiments were disbanded...

. The merger was part of Childers Reforms

Childers Reforms

The Childers Reforms restructured the infantry regiments of the British army. The reforms were undertaken by Secretary of State for War Hugh Childers in 1881, and were a continuation of the earlier Cardwell reforms....

 of the British Army.

The new regiment was designated The Essex Regiment. The Old 44th became the 1st Battalion of the new regiment and the Old 56th became the 2nd Battalion.

For history of the regiment prior to 1881 see:

• 44th Regiment of Foot
  44th Regiment of Foot
  The 44th Regiment of Foot was an infantry regiment in the British Army. After 1782 the regiment became known as the 44th Regiment of Foot. The lineage of the 44th transferred to the Essex Regiment in 1881...
  
  
• 56th Regiment of Foot
  56th Regiment of Foot
  The 56th Regiment of Foot was an infantry regiment in the British Army, active from 1755 to 1881. It was originally raised in Northumbria as the 58th Regiment, and renumbered the 56th the following year when two senior regiments were disbanded...
  
  

The 1st Battalion and the 2nd Battalion both served in South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

 during the Second Anglo-Boer War

Second Boer War

The Second Boer War was fought from 11 October 1899 until 31 May 1902 between the British Empire and the Afrikaans-speaking Dutch settlers of two independent Boer republics, the South African Republic and the Orange Free State...

.