1600-1699

• 1633 - The Royal Regiment of Foot (later the Royal Scots) is placed on the Scottish Establshment, later becoming the oldest infantry regiment in continious service in the British Army.
• 1650 - George Monck's Regiment is formed (later the Coldstream Guards).
• 1656 - Lord Wentworth's Regiment is formed (later the Grenadier Guards).
• 26 January 1661 - King Charles II issues warrant, becoming the acknowledged beginning of the British Army.
• 1661 - The Scots Regiment of Foot Guards is formed (later the Scots Guards).
• 1 October 1661 - The Tangier Regiment is formed (later The Queen's Royal Regiment (West Surrey) , and became the most senior English infantry regiment in the British Army.
• 1684 - The English withdraw from the Tangier Garrison.
• 1688 - The War of the Grand Alliance begins.

1700-1799

• 1702 -- The War of the Spanish Succession begins.
• 1707 - The Kingdom of Great Britain is formed.
• 1722 - The Royal Regiment of Artillery is formed.
• 1742 - War of the Austrian Succession begins.
  • 16 June 1743 - The Battle of Dettingen takes place, which saw King George II become the last British monarch to lead his troops into battle.
• 1751 - A numereal system is introduced into the Army, such as 1st Regiment of Foot, 2nd Regiment of Foot, etc.
• 1755 - Seven Years War begins; it lasts until 1763.
  • 1759 - British forces, led by General James Wolfe, takes French Quebec.
• 1775 - The American War of Independence begins.
  • 17 June 1775 - The Battle of Bunker Hill takes place.
  • October 1777 - British defeated at the Battle of Saratoga.
  • 10 December 1778 - British victory at the Battle of Long Island.
• 1793 - French Revolutionary Wars
  • 1795 - Ceylon captured.
  • 1798 - Irish rebellion takes place.

1800-1899

• 1801 - The United Kingdom of Great Britain and Ireland is formed.
• 1801 - Battle of Alexandria in Egypt.
• 1803 - The Napoleonic Wars begin.
• 1806 - Seizure of the Cape of Good Hope.
  • 1806 - An abortive (initially unauthorised) invasion of Spanish South America begins.
  • 1808 - The Peninsular War begins.
  • 1812 - The War of 1812 against the United States begins.
  • 1814 - The Gurkha War begins.
  • 18 June 1815 - The Battle of Waterloo takes place, ending in defeat for the French.
• 16 August 1819 - The Peterloo Massacre takes place.
• 1854 - The Crimean War begins; ends in 1856.
  • 19 September 1854 - The Siege of Sevastopol begins.
  • 20 September 1854 - The Battle of Alma takes place.
  • 25 October 1854 - The Battle of Balakava takes place; Charge of the Light Brigade.
• 5 November 1854 - The Battle of Inkerman takes place.
• 8 September 1855 - The siege of Sevastopol ends.
• 1857 - The Indian Mutiny begins.
  • 30 May 1857 - rebels begin the Siege of Delhi .
  • 30 June 1857 - Siege of Lucknow begins.
• 1870 - The Army withdraws from Australia and New Zealand.
• 1871 - The Army adopts the Martini-Henry rifle, replacing the Snider .
• 1879 - The Anglo-Zulu War takes place.
  • 22 January 1879 - British force defeated at Battle of Isandlwana.
  • 22 January 1879 - The defence of Rorke's Drift begins; eleven Victoria Crosses would be gained in the process.
• 1 July 1881 - General Order 70 , the culmination of the Cardwell-Childers reforms of the Army's organisation, came into effect.
• 28 January 1885 - General Charles George Gordon is killed by Mahommed Ahmed (the self-proclaimed Mahdi) after his siege of Khartoum ; British relief force arrives two-days later.
• 1889 - The Maxim machine gun is introduced.
• 2 September 1898 - 21st Lancers perform one of the last full cavalry charges at the Battle of Omdurman.
• 11 October 1899 - The Boer War in Southern Africa nbgins.
  • 20 October 1889 - The first major battle of the war takes place at Talana Hill .
  • December 1899 - "Black Week", in which the Army suffered a series of defeats, takes place.

1900-1999

• Boer War
  • 28 February - The Siege of Ladysmith is lifted.
  • 1 April 1900 - The Irish Guards is formed in honour of the Irish regiments in the Boer War.
  • 17 May 1900 - The Siege of Mafeking comes to an end.
• 1905 The 5th Battalion, The Royal Garrison Regiment became the last British battalion to leave Canada.
• 1908 - The Territorial Force (later Army) is formed.
• 1912 - The Vickers machine gun is introduced into the Army; it remained in service until 1968.
• 13 May 1912 - Royal Flying Corps formed from Air Battalion, Royal Engineers. Remains part of the Army.
• August 1914 - The First World War begins.
  • August 1914 - British Expeditionary Force begins to deploy to France.
  • 19 October - The First Battle of Ypres begins; last major action of 1914.
  • 26 February 1915 - The Welsh Guards becomes the last Foot Guards regiment to be formed.
  • 25 April 1915 - Landings at Helles, Gallipoli.
  • 10 August 1915 - Landings at Suvla Bay, Gallipoli.
  • 22 October 1915 - The Machine Gun Corps is formed.
  • April 1916 - The Easter Rising in [[Dublin] takes place .
  • 1 July 1916 - The First Day of the Somme begins; about 60,000 casualties are incurred, 20,000 of whom had been killed.
  • 28 July 1917 - The Heavy Branch of the Machine Gun Corps is split off to form the Tank Corps (later the Royal Tank Regiment).
  • 8 November 1917 - About 200 men of the Warwickshire Yeomanry and Worcestershire Yeomanry charge with sabres drawn and defeat an Ottoman battery and a large group of Ottoman infantry at Huj . It was one of the last cavalry charges by the British Army.
  • 20 November 1917 -- The Battle of Cambrai begins; sees the first large-scale use of tanks.
  • December 1917 - The Capture of Jerusalem takes place.
  • 11 November 1918 - The First World War ends with the signing of the Armistice.
• January 1919 - Anglo-Irish War begins; British forces combat guerilla operations by the ].
  • 1919 - British part of Allied intervention in Russia during its civil war.
• 31 July 1922 - Six Irish regiments (5 infantry and one cavalry) are disbanded due to the establishment of the Irish Free State.
• 5 August 1922 - The Royal Corps of Signals is formed.
• 1936 - uprising in Palestine begins.
• 4 April 1939 - The Royal Armoured Corps is formed.
• 3 September 1939 - Britain enters the Second World War when it declares war, along with its Allies, against Nazi Germany.
  • Septetmber 1940 - Units of the British Expeditionary Force begin to land in France.
  • 17 May 1940 - The Local Defence Volunteers (later the Home Guard) is formed.
  • 20 May 1940- In France, British armoured counter-attack takes place at Arras .
  • 26 May 1940 - The Dunkirk evacuation begins; over 330,000 British and French soldiers are evacuated by 4 June.
  • 22 June 1940 - The Parachute Corps (later The Parachute Regiment) is formed.
  • April 1941 - Germans invade Crete; Army and Commonwealth forces eventually evacuated by Royal Navy.
  • 9 June 1941 - The Cheshire Yeomanry perform the last cavalry charge by the British Army against Vichy French forces in Syria.
  • 25 December 1941 - The garrison at Hong Kong surrenders to the Japanese.
  • 15 February 1942 - Singapore garrison surrenders to Japanese forces.
  • 23 October 1942 - Second Battle of El Alamein takes place; Montgomery's British Eighth Army defeats the Afrika Korps in offensive.
  • 1943 - The Allied invasion of Sicily begins.
  • 1943 - Invasion of Italian mainland begins.
  • March 1944 - The Japanese launch their offensive against India; battles of Imphal and Kohima takes place.
  • 1 April 1944 - The Special Air Service Regiment is formed to administer existing SAS units.
  • 6 June 1944 - in airborne operations prior to D-Day landings, Pegasus an Horse Bridges are taken by D Company, 2nd Ox & Bucks, and Merville gun battery is destroyed by 9th Parachute Battalion .
  • 6 June 1944 - The D-Day landings take place; British Army lands at Gold and Sword; some British units allocated to Canadian beach at Juno.
  • 18 July 1944 - Allie armoured offensive, known as Operation Goodwood, begins.
  • September 1944 - Operation Market Garden takes place.
  • 24 March 1945 - Airborne crossing of the Rhine, known as Operation Varsity, takes place.
  • 8 May 1945 - VE Day takes place.
  • 2 September 1945 - Formal surrender of Japan takes place.
• 1 January 1948 - Four Gurkha regiments are transferred from the Indian Army to the British Army, forming the Brigade of Gurkhas.
• 28 February 1948 - The 1st Battalion, The Somerset Light Infantry (Prince Albert's) becomes the last British regiment to leave India.
• 1948 - The Malayan Emergency begins.
• 1 February 1949 - The Women's Royal Army Corps is formed.
• 1950 - The Korean War begins.
  • 22 April 1951 - The Battle of the Imjin River takes place.
• 1952 - The Mau Mau uprising in Kenya begins.
• 1953 - The Army withdraws its garrison from Bermuda.
• 1954 - The last troops leave Trieste, having been there since 1945 as part of British Forces Element Trieste .
• 1955 - Occupying troops leave upon Austrian independence.
• June 1956 - Last British troops leave the Suez Canal Zone, Egypt.
• 31 October 1956 - Operation Musketeer, the invasion of Suez begins.
  • 5 November - 3rd Battalion, The Parachute Regiment dropped at El Gamil airfield.
  • 6 November - Amphibious landings take place; Army Centurion tanks land in support.
• 1 September 1957 - The Army Air Corps is formed.
• 1957 - The Sandys Review of the armed forces takes place.
• 1961 - Army deploys troops to Kuwait in support of operations in deterring invasion by Iraq.
• 1962 - The Brunei uprising begins.
• 1967 - Withdrawal from Aden after a period of time known as the [[Aden Emergency].
• August 1969 - British troops deployed to Northern Ireland to assist in stopping sectarian violence. It is the beginning of "The Troubles".
• 30 April 1980 - Special Air Service ends the Iranian Embassy siege.
• 2 April 1982 - Falklands War begins.
  • 28 May - 2nd Battalion, The Parachute Regiment (2 Para) defeat Argentinians at Goose Green.
  • 8 June - Bombing of RFA's Sir Galahad, Sir Tristram kils 48, including 32 Welsh Guards.
  • 12 June - 3 Para defeats the Argentinians at Mount Longdon.
  • 14 June - 2 Para takes Wireless Ridge.
  • 14 June - 2nd Battalion, Scots Guards defeat Argentinians at Mount Tumbledown.
  • 14 June - Falkland Islands are liberated upon the surrender of Argentinian forces.
• 1991 The Gulf War begins; Army contributes 28,000 troops.
• 1991 - The last British Army regiment leaves Gibraltar. The Gibraltar Regiment is subsequently placed on the Army's regular establishment.
• 1 October 1992 - I Corps is disbanded and replaced by Headquarters Allied Command Europe Rapid Reaction Corps.
• 1993 - British forces deployed to Bosnia as part of UNPROFOR.
• 31 March 1994 - The British Army of the Rhine is disbanded and replaced by British Forces Germany.
• 1994 - The main force of the Army garrison in Belize is withdrawn; small detachment remains as part of British Army Training and Support Unit Belize .
• 1998 - The Strategic Defence Review white paper is published.
• 1999 - Kosovo War begins.

2000-present

• 2000 - 2 PARA arrived in Freetown, Sierra Leone to evacuate British, Commonwealth and EU citizens.
• 2001 - The Army deploys to the Former Yugoslav Republic of Macedonia.
• 7 October 2001 - U.S. invasion of Afghanistan begins. The SAS was, initially, the main Army contribution.
  • December 2001 - Major-General John Chalmers McColl takes command of ISAF in Afghanistan.
• 20 March 2003 - The US-led invasion of Iraq begins.
  • 6 April 2003 - Britsih forces, led by 7 Armoured Brigade (known as 'The Desert Rats') enter Iraq's second city of Basra.
• 2004 - The defence white paper Delivering Security in a Changing World is published.
• March 2005 - Private Johnson Beharry of the 1st Battalion, Princess of Wales's Royal Regiment is awarded the Victoria Cross for his actions in Iraq in 2004.
• 6 April 2005 - The Special Reconnaissance Regiment became operation.