When war broke out in August 1914 there was a huge wave of volunteers, by Christmas of 1914 there had been hundreds of thousands of British volunteers (which was important because Britain did not introduce conscription until 1916). In January 1916 Britain passed the Military Service Act, this imposed conscription on all single men aged between 18-41. A second act was passed in May 1916 which extended the conscription to married men. Within a year over 1.1 million men had enlisted. 46% of British recruits were conscripts, 54% were volunteers