Statistics for occurrence #1 of “United States” in chapter 7 of Admiral David D. Porter, The Naval History of the Civil War.:
...pating a war between England and the Northern States of the Union.
This excitement grew out of the arrest of the British mail steamer Trent on the high seas, by Captain Charles Wilkes, of the
United States frigate San Jacinto, and taking from her four male passengers who claimed the protection of the British flag.
Two of these gentlemen were Messrs. Mason and Slidell, formerly members of the U. S. ...
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