Mobilisation The East Anglian Division was a week into its fortnight's annual training at Clacton when the order to mobilise arrived on 4 August 1914. The units immediately proceeded to their designated war stations defending the East Anglian coast, with 7th Essex at
Felixstowe. They were relieved on 9 August to return to Walthamstow to mobilise, and by 10 August the division was concentrated around Brentwood, with 7th Battalion HQ at the
'Golden Fleece' inn. It later moved to the cavalry barracks in
Norwich, and then
Costessey Hall. Although recruiting was brisk, the Essex men were enlisted for Home Service and only afterwards asked if they wished to volunteer for
Overseas Service, which many did not. Hence the reserve or 2nd-Line battalions filled up quickly, while the 1st-Line battalions remained under strength. However, in August 1914 the Essex Brigade formed a
service battalion of volunteers from all four battalions. This was put at 24 hours notice for service in France, but was stood down in November and the men returned to their battalions. In January 1915 the 2nd-Line battalions formed a 2nd Essex Brigade, which was later numbered
206th (2nd Essex) Brigade but never went overseas. The East Anglian division was employed on coast defence until May 1915, when it concentrated around
St Albans to prepare for overseas service. At this time it was numbered, becoming the
54th (East Anglian) Division, and the Essex Brigade became
161st (Essex) Brigade. On 8 July it heard that it was to be employed at
Gallipoli.
Order of Battle 161st Brigade comprised the following units during the war: • 1/4th Battalion, Essex Regiment • 1/5th Battalion, Essex Regiment •
1/6th Battalion, Essex Regiment •
1/7th Battalion, Essex Regiment • 161st Brigade Machine-Gun Company,
Machine Gun Corps (formed 23 April 1916, moved to 54th Battalion Machine Gun Corps 19 April 1918) • 161st Trench Mortar Battery
(formed 17 May 1917) Insignia During the war, the brigade adopted shoulder flashes coloured red and black, divided vertically, with the red worn to the front on each arm. The four battalions adopted distinctive shapes for these patches: • 4th Battalion: circle • 5th Battalion: triangle • 6th Battalion: horizontal rectangle • 7th Battalion: square
Gallipoli 161st Brigade sailed from
Devonport, Devon between 21 and 26 July 1915 and assembled at
Mudros. The rest of 54th Division landed at
Suvla Bay on 10 August in a last attempt to restart the stalled
Gallipoli Campaign, but was misused and stalemate ensued. 161st Brigade (less 1/4th Essex) landed during the night of 11/12 August and relieved
163rd (Norfolk and Suffolk) Brigade who were to make an attack. The Essex battalions arrived still understrength, and armed with obsolete long
Lee–Enfield rifles – many soldiers exchanged these for modern
SMLE weapons picked up from casualties. On the afternoon of 14 August the brigade advanced over open ground to relieve the
Norfolks and
Suffolks after their disastrous attack. The Essex Brigade's historian records that 'Though they were met with a fusillade as they advanced steadily over the plain there was no hesitation'. They reached the line and spent all night consolidating the position. On 17/18 August the brigade (now completed by the arrival of 1/4th Battalion) relieved the
10th (Irish) Division at Kiretch Tepe. Intermittent shellfire on these positions caused considerable casualties before the brigade was relieved on 22 August. The brigade then moved to the Lala Baba sector, and from 1 to 10 September interchanged with parties of the
4th Australian Brigade, some holding positions known as 'Table Top', and 'Rhododendron Spur', others working on new trenches. Throughout September and October 1915, 54th Division made preparations to complete the capture of
Hill 60 sector, described by one of the officers as 'notoriously one of the most unpleasant spots on the peninsula'. The main task was assigned to 163rd Brigade, which was strengthened by 1/7th Essex, the
1/8th Battalion,
Hampshire Regiment being transferred to 161st Brigade in exchange for three months. However, although a mine was exploded under Hill 60, the main operation was cancelled because of the weak state of 54 Division: during September to November 1915, 161st Brigade lost 2 officers and 33 other ranks killed and 8 officers and 103 men wounded, but in the same period 45 officers and 1659 other ranks were admitted to hospital sick. On the night of 26/27 November, the 161st (Essex) Brigade was relieved by
Gurkhas and the
New Zealand Mounted Rifles Brigade, the relief being delayed by a severe rainstorm that flooded the trenches. After a few days in the rest area, 54 Division marched down to the beach and embarked for
Mudros, where the battalions reverted to their former brigades. It did not return to the peninsula, which was later evacuated, and instead the division sailed to
Alexandria.
Egypt As soon as it arrived in Egypt, 161st Brigade became involved in the
Senussi Campaign, marching out on 28 December to replace the
New Zealand Rifle Brigade guarding the coast railway from Alexandria to Da'aba. The Essex battalions were relieved from this duty on 4 March 1916 by the
2nd County of London Yeomanry and moved into the No 1 (Southern) Section of the
Suez Canal Defences. The Brigade Machine Gun Company was formed at Shallufah on 22–23 April by taking two officers and the machine-gun (MG) detachment from each battalion. The 8
Vickers machine guns thus collected were increased to 16 and the Essex men transferred to the
Machine Gun Corps In August the troops were moved northwards to counter a Turkish thrust at the canal, resulting in the
Battle of Romani. 161st Machine Gun Company was the only unit of 54th Division engaged in this action, though 1/5th and 1/7th Essex were in the area. On 5 August, supporting
52nd (Lowland) Division round Mount Rowston, the company took part in the decisive action of the battle, resisting a stiff attack in which it suffered several casualties, and won a number of gallantry awards.
Sinai and Palestine During 1916, the units of 54 Division were steadily brought up to strength by the arrival of drafts, and in mid-January 1917 the division assembled for the opening of the
Palestine Campaign. It took the whole of February for 161st Brigade to cross the
Sinai Desert in stages. It was then involved in all three Battles of Gaza, in March, April and November 1917. At the
First Battle of Gaza (26 March 1917), the main attack was made by
53rd (Welsh) Division with 161st Brigade in support. Towards the end of the day the Essex Brigade was ordered to take Green Hill: despite heavy fighting the attack was a complete success and the brigade held the whole position by nightfall. However, confusion set in, and 53rd Division withdrew during the night. The men of 161st Brigade were enraged by the order to withdraw. The following day patrols showed that the Turks had not reoccupied the position; 1/7th Bn was sent up to support the patrols, but a violent Turkish counter-attack finished the battle. The battalion's casualties at Green Hill were 228, of whom 68 were missing after the fighting withdrawal. For the
Second Battle of Gaza (17–19 April 1917) 1/7th Battalion was detached from 161st Brigade and was assigned to the
Imperial Camel Corps (ICC), which was protecting the left flank of 54th Division. On 16 and 17 April the 1/7th Essex was escorting artillery. On 19 April the battalion remained with the Hong Kong and Singapore Battery in support of the ICC's morning attack, and then at 10.30 pushed forward to help the right flank of 3rd (Australian) Camel Battalion when the Australian Light Horse retired. The rest of 161st Brigade was in divisional reserve and only suffered a few casualties from shellfire.. However, the main assault had failed again and Gaza remained untaken. During the summer months 161st Brigade held the line without suffering serious casualties, and recovered its strength for the forthcoming
Third Battle of Gaza (1–3 November 1917). On the morning of 2 November the 54th Division put in a holding attack at the El Arish Redoubt. The fighting was confused, but the division took all its objectives. However, the 1/7th Battalion found that the fourth objective, 'John Trench', was a mere scrape in the ground and could not be held. The brigade commander considered that this battalion had the hardest time of all that day. At 04.00 on 3 November, 1/7th made a renewed attempt to take their objective, but were again held up by Turkish machine-gun fire. The battalion's casualties over the three days were heavy, at 281 all ranks. During the rapid pursuit after the fall of Gaza, 1/4th and 1/6th Essex assisted the
ANZAC Mounted Division, while 1/5th and 1/7th were left marching in the rear. As well as battle casualties, the whole brigade suffered considerably from
influenza during November–December 1917 and throughout 1918. The weakened brigade was mainly engaged in line-holding until September 1918. 54th Division was held in readiness to move to reinforce the
Western Front, but in the end was not sent. 54th Division returned to the offensive for the
Battle of Megiddo (19–25 September 1918), which finally broke the Turkish resistance. To support the breakthrough, 161st Brigade was to secure the Es Zakur line and then form a defensive flank. The brigade formed up before dawn on 19 September, and attacked under the cover of an overhead barrage from the machine gun companies. The brigade's first line took the two objectives successfully. The main assault completely broke through the Turkish lines and opened the way for the cavalry to pursue the defeated enemy. 161st Brigade was left behind for a week on battlefield clearance before joining the pursuit. By the time the
Armistice with Turkey was signed on 30 October 1918, 54th Division had reached
Beirut.
Demobilisation Soon after the Armistice, 54th Division moved back to Egypt by sea. Preparations for demobilisation began, but civil unrest in Egypt meant that 161st Brigade was engaged in peacekeeping duties from March to May 1919. After June the duties became very light and demobilisation proceeded. 1/7th Battalion was absorbed by 1/5th Battalion, and the Essex Brigade was fully demobilised by Christmas 1919. ==Between the wars==