The sinking turned public opinion in many countries against Germany, contributed to the entry of the United States into World War I, and became an iconic symbol in recruiting campaigns of why the war was being fought?

It´s the sinking of the British passenger ship Lusitania, sunk in the Atlantic by a torpedo fired by a German U-boat on May 7, 1915. The number of mortal victims is 1.198 , 128 of them Americans. It was one of the main factors that contributed to turn American public opinion - and in other nations - against Germany.

Explanation:

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

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yes

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