The 18th Infantry Division was an infantry division of the British Army which fought briefly in the Malayan Campaign of the Second World War. In March 1939, after the re-emergence of Germany as a European power and its occupation of Czechoslovakia, the British Army increased the number of divisions in the Territorial Army (TA) by duplicating existing units. The 18th Infantry Division was formed in September 1939 as a second-line duplicate of the 54th (East Anglian) Infantry Division, with men from Essex and the East Anglian counties of Norfolk, Suffolk and Cambridgeshire.

The division was based in Britain from 1939 to 1941, undergoing training and being moved around the country. This included an anti-invasion role in East Anglia, training in Scotland, and redeployment to the North West where the division also helped unload merchant ships during the Liverpool Blitz. Towards the end of 1941, the British government sought to reinforce the British Army in North Africa to demonstrate to the Dominions that the United Kingdom was doing its fair share of fighting in the Middle East and to prepare for Operation Crusader. The division left Britain during October bound for Egypt.

By December, the convoy had reached South Africa and was preparing for the final stretch of its journey when news of the Japanese entry into the war was received. This resulted in most of the 18th Infantry Division being diverted to India to reinforce British forces facing the Japanese. The 53rd Brigade was sent to Singapore, from where it was deployed north to Johore and became embroiled in the Battle of Muar. After several short engagements with Japanese forces, the brigade was withdrawn to Singapore Island. Between 29 January and 5 February, the rest of the division arrived in Singapore having sailed from India. Shortly afterwards, the entire division participated in the Battle of Singapore.

Initially deployed to northeastern Singapore Island, the division remained largely inactive while the Japanese attacked the north-west sector. Following the establishment of a Japanese beachhead, the division was broken up and deployed piecemeal in the battle. One battalion was assigned to a different formation and several units formed two battlegroups. After the initial engagements, the division was regrouped for a final stand in the city of Singapore and repulsed several Japanese attacks. The division, with the rest of the garrison, surrendered to the Japanese on 15 February 1942. It was not reconstituted. Over one-third of the division's personnel died in captivity, including divisional commander Major-General Merton Beckwith-Smith.

Background During the 1930s, tensions increased between Germany and the United Kingdom and its allies. In late 1937 and throughout 1938, German demands for the annexation of Sudetenland in Czechoslovakia led to an international crisis. To avoid war, the British Prime Minister Neville Chamberlain met with German Chancellor Adolf Hitler in September and brokered the Munich Agreement. The agreement averted a war and allowed Germany to annexe the Sudetenland. Although Chamberlain had intended the agreement to lead to further peaceful resolution of issues, relations between both countries soon deteriorated. On 15 March 1939, Germany breached the terms of the agreement by invading and occupying the remaining Czech provinces of Bohemia and Moravia.

On 29 March, British Secretary of State for War Leslie Hore-Belisha announced plans to increase the Territorial Army (TA), a reserve of the regular army made up of part-time volunteers, from 130,000 to 340,000 men and double the number of TA divisions. The plan was for existing units to recruit over their establishments, aided by an increase in pay for Territorials, the removal of restrictions on promotion which had hindered recruiting, the construction of better-quality barracks, and an increase in supper rations. The units would then form second-line divisions from cadres which could be increased. The 18th Infantry Division was a second-line unit, a duplicate of the first-line 54th (East Anglian) Infantry Division. In April, limited conscription was introduced. This resulted in 34,500 twenty-year-old militiamen being conscripted into the regular army, initially to be trained for six months before deployment to the forming second-line units. Despite the intention for the army to grow, the programme was complicated by a lack of central guidance on the expansion and duplication processes and a lack of facilities, equipment and instructors.

Formation and home defence

It was envisioned that the duplicating and recruiting processes would take no more than six months. Although some TA divisions had made little progress by the time the Second World War began, others completed this work within weeks. The 18th Infantry Division became active on 30 September 1939; prior to this its units had formed, and were administered by the parent 54th (East Anglian) Infantry Division. The 18th Division was composed of the 53rd, 54th and 55th Infantry Brigades, and divisional support troops. The division was formed with men from the county of Essex and the East Anglian counties of Norfolk, Suffolk and Cambridgeshire. According to the Imperial War Museums, its insignia (windmill sails) denotes "the association of the Division with East Anglia". The 53rd Brigade consisted of the 5th Battalion, Royal Norfolk Regiment (5RNR), 6th Battalion, Royal Norfolk Regiment (6RNR), and the 2nd Battalion, Cambridgeshire Regiment (2CR). The 54th Brigade controlled the 4th Battalion, Royal Norfolk Regiment (4RNR), 4th Battalion, Suffolk Regiment (4SR), and the 5th Battalion, Suffolk Regiment (5SR). The 55th Brigade was made up of the 5th Battalion, Bedfordshire and Hertfordshire Regiment (5BHR), 1st Battalion, Cambridgeshire Regiment (1CR), and the 1/5th Battalion, Sherwood Foresters (1/5SF). The division's first general officer commanding (GOC) was Major-General Thomas Dalby, who had been brought out of retirement.

Major-General Bernard Paget assumed command on 30 November 1939, replacing the again-retiring Dalby. The division was initially assigned to Eastern Command, and was based in Norfolk by early 1940. The opening months of the war allowed little time to train, and the division guarded airfields and other key points. By summer, it was under the command of II Corps and was spread throughout Cambridgeshire, Norfolk and Suffolk. On 20 April, Paget left the division temporarily and was replaced by Brigadier Edward Backhouse (commander of 54th Brigade). Paget was deployed to Norway, where he commanded Sickleforce (the 15th and 148th Infantry Brigades) after their landing at Åndalsnes during the Norwegian Campaign. When the campaign failed, Paget returned briefly to the division on 14 May 1940; thirteen days later, he became Chief of Staff, Home Forces and was temporarily replaced by Brigadier Geoffrey Franklyn.

The TA's war deployment envisioned its piecemeal use, as equipment became available, to reinforce the British Expeditionary Force (BEF) already dispatched to Europe. The TA divisions would the join regular army divisions as the divisions completed their training and received their equipment, with the final divisions deployed a year after the war began. The division did not leave Britain at that time, since the BEF was withdrawn from France during the May–June 1940 Dunkirk evacuation. The evacuation had resulted in the abandonment of much of the BEF's equipment, leaving troops in Britain sparsely equipped. Priority for new equipment was given to a handful of formations that would respond to any German landings, leaving the 18th Division with little of what was required. An infantry division should have been equipped with seventy-two 25-pounder field guns; on 31 May 1940, the 18th Division was equipped with four First World War-vintage 18-pounder field guns and eight 4.5-inch howitzers of similar age. The division had no anti-tank guns (compared with the usual 48), and only 47 of the required 307 Boys anti-tank rifles.

During the summer of 1940, the 18th Infantry Division had several changes of command. Major-General Thomas Eastwood took command on 1 June before leaving to become chief of staff of the Second BEF under the command of Lieutenant-General Alan Brooke. Major-General Lionel Finch, previously Director of Recruiting and Organization and Deputy Adjutant-General to the Forces, took command on 9 June before his replacement by Major-General Merton Beckwith-Smith (who had commanded the 1st Guards Brigade during the Battle of France) on 14 July. He remained with the division for the remainder of its existence.

Although the division was then assigned to an anti-invasion role in East Anglia, a number of training exercises were held in other parts of England as well as in Scotland, and Wales. In the autumn of 1940, it moved permanently to Scotland. Divisional headquarters was established at Melrose, with the troops spread across the Scottish Borders from Dumfries to Duns. Further divisional exercises were conducted, facing contingents of exiled Belgians, Czechs, Norwegians, and Poles. Unfounded rumours began to circulate that the division would soon be deployed overseas.

It was assigned to Western Command and moved to North West England and the West Midlands in April 1941, replacing the 38th (Welsh) Infantry Division. The division was spread out between Liverpool, Manchester and Birmingham, with divisional headquarters at Ribbesford House near Bewdley. During the Liverpool Blitz, several hundred men were deployed to the city for several weeks to help unload cargo ships. This deployment saw the division's first casualties of the war, due to German bombing. On 18 July, Brooke (now Commander-in-Chief, Home Forces) inspected elements of the division which were based in Crewe.

Overseas service Transfer to Middle East Winston Churchill, who has succeeded Chamberlain on 10 May 1940, had grown concerned in 1940 about the expansion of British supply services in Egypt under Middle East Command compared to the number of fighting men, and pushed for the dispatch of additional fighting formations. This had been a source of friction with General Archibald Wavell and his replacement, General Claude Auchinleck, who wanted rear-area personnel and replacements for fighting formations rather than new divisions. Churchill was adamant that additional complete British fighting formations be dispatched, not replacements or logistical troops, "to give the Dominions no cause to feel that the bulk of the fighting was done by their troops". On 1 September 1941, Churchill contacted neutral U.S. President Franklin D. Roosevelt and requested shipping for two infantry divisions from Britain to the Middle East. Roosevelt responded that shipping could be provided for only one division, sailing from Halifax, Nova Scotia. The 18th Infantry Division left Liverpool aboard the heavily escorted convoy CT.5 on 28 October, bound for Nova Scotia. Three days later, an American-escorted convoy left Halifax with six cargo ships provided to the British as part of the Lend-Lease programme. The convoys met in mid-ocean on 2 November, and exchanged escort groups; the British ships and Lend-Lease cargo ships headed for the United Kingdom, and the (now American-escorted) convoy CT.5 continued to Nova Scotia. The division arrived in Halifax on 7 November, and transferred to the waiting American ships of convoy WS.12X over the next few days. The British ships returned home, and convoy WS.12X departed Halifax on 10 November for the Middle East.

Diversion to Far East