The Sussex Pledge did not stop unrestricted submarine warfare, but rather aimed to limit it against civilian vessels.
False
The statement is false. The Sussex Pledge was not a promise to stop unrestricted submarine warfare; it was a promise to limit its use against civilian vessels. While the pledge required submarines to announce themselves before sinking a ship, it did not stop unrestricted submarine warfare entirely.
Despite the Sussex Pledge, Germany's submarine warfare continued, leading to the eventual resumption of unrestricted submarine warfare, notably culminating in the sinking of the Lusitania.
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