Territorial Army (United Kingdom) in the context of Richard Haldane, 1st Viscount Haldane

The British Expeditionary Force (BEF) was the contingent of the British Army sent to France in 1939 after Britain and France declared war on Nazi Germany on 3 September, beginning the Second World War. The BEF existed from 2 September 1939 when the BEF GHQ was formed until 31 May 1940, when GHQ closed down and its troops reverted to the command of Home Forces. During the 1930s, the British government had planned to deter war by abolishing the Ten Year Rule and rearming from the very low level of readiness of the early 1930s. The bulk of the extra money went to the Royal Navy and the Royal Air Force but plans were made to re-equip a small number of Army and Territorial Army divisions for service overseas.

General Lord Gort was appointed to the command of the BEF on 3 September 1939 and the BEF began moving to France on 4 September 1939. The BEF assembled along the Belgian–French border. The BEF took their post to the left of the French First Army under the command of the French 1st Army Group (fr:Groupe d'armées n° 1) of the North-Eastern Front (Front du Nord-est). Most of the BEF spent the Phoney War (3 September 1939 to 9 May 1940) digging field defences on the border. When the Battle of France (Fall Gelb) began on 10 May 1940, the BEF constituted 10 per cent of the Allied forces on the Western Front.

There are 13 cavalry regiments of the British Army each with its own unique cap badge, regimental traditions, and history. Of the currently nine regular cavalry regiments, two serve as armoured regiments, three as armoured cavalry regiments, three as light cavalry, and one as a mounted ceremonial regiment. There are also four yeomanry regiments of the Army Reserve, of these, three serve as light cavalry and one as an armoured regiment. Each yeomanry light cavalry unit has been paired with a regular unit of the same role, the armoured yeomanry unit is paired with the two regular armoured units (and a further armoured unit which is not cavalry). All except the Household Cavalry are part of the British Army's Royal Armoured Corps.

The Territorial Force was a part-time volunteer component of the British Army, created in 1908 to augment British land forces without resorting to conscription. The new organisation was create by the Territorial and Reserve Forces Act 1907 (7 Edw. 7. c. 9), which consolidated the 19th-century Volunteer Force and yeomanry into a unified auxiliary, commanded by the War Office and administered by local county territorial associations. The Territorial Force was designed to reinforce the regular army in expeditionary operations abroad, but because of political opposition it was assigned to home defence. Members were liable for service anywhere in the UK and could not be compelled to serve overseas unless they volunteered to do so.

In the first two months of the First World War, territorials volunteered for foreign service in significant numbers, allowing territorial units to be deployed abroad. They saw their first action on the Western Front during the initial German offensive of 1914, and the force filled the gap between the near destruction of the regular army that year and the arrival of the New Army in 1915. Territorial units were deployed to Gallipoli in 1915 and, following the failure of that campaign, provided the bulk of the British contribution to allied forces in the Sinai and Palestine Campaign. By the war's end, the Territorial Force had fielded twenty-three infantry divisions and two mounted divisions on foreign soil. It was demobilised after the war and reconstituted in 1921 as the Territorial Army by the Territorial Army and Militia Act 1921 (11 & 12 Geo. 5. c. 37).

Remembrance Sunday is held in the United Kingdom as a day to commemorate the contribution of British and Commonwealth military and civilian servicemen and women in the two World Wars and later conflicts. It is held on the second Sunday in November (the Sunday nearest to 11 November, Armistice Day, the anniversary of the end of hostilities in World War I in 1918). Remembrance Sunday, within the Church of England, falls in the liturgical period of Allsaintstide.

It is marked by ceremonies at local war memorials in most cities, towns and villages, attended by civic dignitaries, ex-servicemen and -women (many are members of the Royal British Legion and other veterans' organisations), members of local armed forces regular and reserve units (Royal Navy and Royal Naval Reserve, Royal Marines and Royal Marines Reserve, Army and Territorial Army, Royal Air Force and Royal Auxiliary Air Force), military cadet forces (Sea Cadet Corps, Army Cadet Force and Air Training Corps as well as the Combined Cadet Force) and youth organisations (e.g. Scouts, Boys' Brigade, Girls' Brigade and Guides). Representatives of the Judiciary also lay wreaths at local war memorials throughout the country. Wreaths of remembrance poppies are laid on the memorials, and two minutes' silence is held at 11 am. Church bells are usually rung half-muffled, creating a sombre effect. The overall ceremony, including parades, service and wreath laying, typically lasts about two hours.