These tactics were to prove so successful in 1917 and 1918 that the French dubbed them `` Hutier tactics '' , although the more commonly used term today is `` infiltration tactics '' . The tactics became especially associated with the stormtroopers of the German Army , where they were also called Hutier tactics , after General Oskar von Hutier , who used these tactics to great effect during Operation Michael in March 1918 .