Which weapons resulted in troops resorting to trench warfare?

Machine guns and gernades. With the raid advancments in technology during war these weapons could rapidly fire causing the troops to find other needs of coverage resulting in trench warfare.

mashine guns

Explanation:

answer; i believe its a

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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