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.
Operation Braunschweig Operation "Braunschweig" (Eng: "Brunswick"), named after the German city, was the German summer offensive that began on 28 June 1942. The operation was initially named "Fall Blau" (Case Blue), which is the common name used for the whole offensive. The name was changed from "Blau" to "Braunschweig" on 30 June. The plans following the original Case Blue (originally named "Blue I" and "Blue II") were renamed to Operation Clausewitz and Operation Dampfhammer. "Clausewitz" detailed the beginning of the operations of Army Group A in July 1942, "Dampfhammer" the follow-up operations in July 1942.