Timeline of the British Army 1900–1999

The Time line of the British Army 1900–1999 lists the conflicts and wars the British Army were involved in.


 * Boxer Rebellion ended 1901
 * Anglo-Aro War 1901–1902
 * Second Boer War ended 1902
 * World War I 1914–1918
 * Easter Rising 1916
 * Third Anglo Marri War 1917
 * Third Afghan War 1919
 * Irish War of Independence 1919–1921
 * World War II 1939–1945
 * Greek civil war 1946-47
 * Malayan Emergency 1948–1960
 * Korean War 1950–1953
 * Mau Mau Uprising 1952–1960
 * Cypriot Independence 1955–1959
 * Suez Crisis 1956–1957
 * Brunei Revolt 1962–1966
 * Indonesia–Malaysia confrontation 1962-1966
 * Dhofar Rebellion 1962–1975
 * Aden Emergency 1963–1967
 * The Troubles 1968–1998
 * Operation Banner 1969–2007
 * Falklands War 1982
 * Gulf War 1990–1991
 * Yugoslav wars 1991–2001
 * Bosnian War 1992–1995
 * Kosovo War 1998–1999