The US did not immediately declare war against Germany after the sinking of the "Arabic" in 1915.
False
It is false that the US immediately declared war against Germany after the "Arabic" was attacked by German U-boats in 1915. While the sinking of the Lusitania in 1915 did influence American sentiment, the US did not enter World War I until 1917. The decision to declare war was primarily driven by Germany's resumption of unrestricted submarine warfare and the Zimmerman Telegram.
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