Because the mobile offensives practised by both sides usually focused on avoiding the strongest points of a defensive line, these defences were usually relatively thin and spread along the length of a line.
Budući da su mobilne ofenzive, koje su prakticirale obje strane, obično bile fokusirane na izbjegavanje najjačih točaka obrambene linije, ovakve obrane bile su obično relativno tanke i prostirale su se duž čitave linije.