The dates on which electoral registers came into force were changed from time to time and sometimes varied across different parts of the country: in England and Wales, registers came into force on 1 November between 1832 and 1842, and 1 January between 1844 and 1915. The 1832 system broke down during the First World War: registers were not revised after 1915, and with many voters serving in the armed forces or relocating in order to take up war work, the registers became very outdated.