Well this one seems kind of obvious, but Trench Warfare is called Trench Warfare because the men fought in Trenches during WW1 in which trench warfare was utilized.
Both sides were involved in trench warefare.
Trench Warefare
the reason for trench warfare was to take cover from enemy fire and motar shell fargments.
Trench Warfare.
If I recall the three were in a Trench or Trench Warefare, In a corn field, and on a bridge but that was a diversion cause they were going around.
The invention of machine guns, gas warfare and trench warfare
there was chemical warefare,machine guns,Artillery,Trench warfare,and Tanks
The Germans faced France and French colonial forces, Britain and Britich colonial forces, and, eventually, the Americans on their Western Front in trench warfare. Austrian and Germans faced the Russians for a time on the Eaastern Front, some of that in trench warefare.
sumbmarine warefare
A lunar trench is called a Rille (the German word for groove).
Oceanic trench.
It is known as a trench, which is the lower part of the ocean. The deepest trench is the Marina Trench.