Question

Why did WWI settle into Trench Warfare?

Answer 1

Answer:

Trench warfare is a type of land warfare using occupied fighting lines largely comprising military trenches, in which troops are well-protected from the enemy's small arms fire and are substantially sheltered from artillery. Trench warfare became archetypically associated with World War I (1914–1918), when the Race to the Sea rapidly expanded trench use on the Western Front starting in September 1914.

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Answer 2

Trenches were used to try to protect soldiers from poison gas, giving them more time to put on gas masks and try and protect them more from other types of warfare