Key facts
- Dates
- 1914-1918
- Armistice
- 11 November 1918
- Remembrance
- 11 November - poppies worn
- British deaths
- Nearly 1 million
- Memorial
- Cenotaph, Whitehall, London
World War One was one of the deadliest conflicts in history. Britain and its Empire played a major role, suffering enormous losses that affected almost every family in the country.
Causes
The war had several underlying causes:
- Alliance systems - Europe was divided into two armed camps
- Imperial rivalries - Competition for colonies and trade
- Arms race - Military build-up, especially between Britain and Germany
- Nationalism - Especially in the Balkans
- Assassination - Archduke Franz Ferdinand of Austria killed in Sarajevo (28 June 1914)
The Sides
Allied Powers
- Britain and the British Empire
- France
- Russia (until 1917)
- Italy (from 1915)
- USA (from 1917)
Central Powers
- Germany
- Austria-Hungary
- Ottoman Empire
Key Events
- 1914 - War begins; Battle of Mons; trench warfare develops
- 1915 - Gallipoli campaign; use of poison gas
- 1916 - Battle of the Somme (1 million casualties); Battle of Jutland
- 1917 - USA enters war; Battle of Passchendaele
- 1918 - German spring offensive fails; Armistice (11 November)
Remembrance
The war killed around 17 million people, including nearly 1 million from Britain and its Empire. Remembrance Day on 11 November honours those who died.
- Two-minute silence at 11am on 11 November
- Poppies - Worn to remember the fallen (inspired by poppies in Flanders fields)
- Cenotaph - The national war memorial in London
Legacy
- Empires collapsed (German, Austro-Hungarian, Ottoman, Russian)
- Women gained greater rights (including the vote in 1918)
- League of Nations created (forerunner of the UN)
- Seeds of World War Two planted by the Treaty of Versailles
Why it comes up in the test
Know the dates, the key facts about Remembrance Day, and the impact on Britain.
Common traps
- Confusing WWI and WWII dates
- Forgetting why we wear poppies
- Not knowing when Remembrance Day is
World War One (1914-1918): common questions
Related topics
- World War Two (1939-1945)The global conflict from 1939 to 1945, in which Britain and the Allies fought Nazi Germany, Italy, and Japan. Britain stood alone against Hitler for over a year.
- Remembrance DayHeld on 11 November to remember those who died in wars, marked by wearing poppies, a two-minute silence at 11am, and ceremonies at war memorials.
Written from Life in the United Kingdom: A Guide for New Residents (3rd edition), the only official source for the test. BritPass is not affiliated with the Home Office; if anything here differs from the handbook, the handbook is right.

