Because they used relatively dominant defensive weapons, such as machine guns,wires and artillery compared to the offensive weapons, such as rushing infantry over the top to be slaughtered and inaccurate offensive artillery this caused stalemates and thus made the war slower and thus changed the nature of the war to a war of attrition
"Trench warfare was used in World War I"
Trench warfare is where people or armies battle in trenches
Trench warfare is famous because of its large scale use during World War 1. During the war, both sides used this type of warfare for protection.
sap
Trench warfare. Warfare fought between men in trenches. No, I think trench warfare is about as good as it gets. Would the word "attrition" work for you? - attrition: constant wearing down to weaken or destroy (often in the phrase war of attrition)
World War 1 introduced aerial warfare with airplanes and trench warfare
"Trench warfare was used in World War I"
Trench warfare was one type, and one which was used more than it had been in any previous war (and maybe since then). Also, things such as gas attacks are classed as well as use of tanks to invade enemy territory and fighter planes.
Trench warfare. They would sit in trenches and shoot at the enemy trench
Trench warfare. They would sit in trenches and shoot at the enemy trench
Trench Warfare
Trench Warfare
trench warfare
war.
trench warfare chemical warfare
They used trench warfare.
Trench warfare is where people or armies battle in trenches