The trench deadlock was broken by occasional large offensives, and by constant shelling, sniping, and raids. These attacks across No Man’s Land and into enemy lines could be small efforts by a handful of soldiers to gather information or capture prisoners, or large, complicated affairs involving artillery, aircraft, engineers, and hundreds of troops.
Trench raiders used clubs and daggers when possible to strike silently to disable or kill an unsuspecting enemy. They were preferred to rifles, revolvers, and grenades (known as 'bombs' during World War 1).