The Arbalète sauterelle type A allowed bombs to be thrown into trenches beginning what was called what?
Trench warfare Trench warfare is a type of land warfare using occupied fighting lines consisting largely of trenches, in which troops are significantly protected from the enemy's small arms fire and are substantially sheltered from artillery. The most famous use of trench warfare is the Western Front in World War I. It has become a byword for stalemate, attrition, sieges and futility in conflict.
BLU-116 The BLU-116 is a United States Air Force bomb, designed as an enhanced "Bunker buster" penetration weapon, designed to penetrate deep into rock or concrete and destroy hard targets.