Why did events like the sinking of the Lusitania and discovery of the Zimmerman Note start to change American public opinion on World War I?
>Americans had been largely neutral, but attacks and threats against civilians, trade, and territory gave credence to the preparedness movement.
>Most Americans supported the preparedness movement and the expansion of the armed forces until the death tolls began a steady rise.
>These events killed or threatened Americans and led most to call for an even deeper isolationism that would stop international trade.
>Despite neutrality, Americans had great sympathy for both sides of the war until these events ended virtually any support for Germany.
The correct answer is:
Despite neutrality, Americans had great sympathy for both sides of the war until these events ended virtually any support for Germany.