In Britain, as in most of the world, the impact of the First World War was essential for the final success of the campaign for votes for women. In some parts of the British Empire, however, the breakthrough was made before then. New Zealand was the first country to give women the right to vote in national elections in 1893. Before then, women gained the right to vote in elections to the House of Keys on the Isle of Man in 1881; and state elections in South Australia in 1887. Australia granted the vote across the whole country in 1902.