Field entrenchment
Field entrenchment is the activity of provision of cover and :wikt:concealment|concealment, usually by the infantry arm of service, possibly with assistance from combat engineers or sappers. The entrenched position is intended to be a temporary one, taking maybe a day to create and to be held for no more than a week. However, during World War I these entrenched positions were progressively made more sophisticated over longer periods, leading to their evolution into tactical, operational and strategic stalemates and the emergence of trench warfare.
