The 1918 United Kingdom general election was called immediately after the Armistice with Germany which ended the First World War, and was held on Saturday, 14 December 1918. The governing coalition, under Prime Minister David Lloyd George, sent letters of endorsement to candidates who supported the coalition government. These were nicknamed Coalition Coupons, and led to the election being known as the "coupon election". The result was a massive landslide in favour of the coalition, comprising primarily the Conservatives and Coalition Liberals, with massive losses for Liberals who were not endorsed. Nearly all the Liberal MPs without coupons were defeated, including party leader H. H. Asquith.
It was the first general election to be held after enactment of the Representation of the People Act 1918. It was thus the first election in which women over the age of 30 (with some property qualifications), and all men over the age of 21, could vote. Previously, all women and many poor men had been excluded from voting. Women generally supported the coalition candidates.