pincer movement
From Longman Dictionary of Contemporary EnglishRelated topics: Militarypincer movementˈpincer ˌmovement noun [countable] PMa military attack in which two groups of soldiers come from opposite directions in order to trap the enemy between themExamples from the Corpuspincer movement• Those at either end of the line usually advance rather faster than those in the centre so that a pincer movement develops.• It is a favourite military tactic ... the pincer movement!