Trench warfare was mostly used, and planes were used to locate enemy positions
Trench war fare was employed in world war 1
Trench warfare
Trench Warfare
Trench warfare.
World War I was fought by trench warfare.
they used trench warfare and used powerful machineguns
world war 1 used a trench warfare i think.... we did it in history but I can't exactly remember
Warfare in World War 2 are illegal and dangerous than warfare in World War 1.
air combat, trench warfare.
The First World War.
your answer is in the category trench warfare was one of them there was also air warfare
it was used to defend yourself from the oposition.