The British Third Army employed tactics giving platoons more independence at the Battle of Arras in April 1917 (most notably the capture of Vimy Ridge by the Canadian Corps), following the reorganisation of British infantry platoons according to the new Manual SS 143. This still advocated wave attacks, taking strongpoints and consolidating before advancing, part of "bite-and-hold" tactics, but this did allow for more local flexibility, and set groundwork for low-level unit initiative, an important aspect of infiltration tactics.