Statistics for occurrence #1 of “Fort Sumter” in chapter 2 of Admiral David D. Porter, The Naval History of the Civil War.:

...Merrimac, etc., etc. At thirty minutes past 4 o'clock, on April 12, 1861, the first gun of civil war was fired, the battery on James Island discharging the first howitzer shell, which fell inside Fort Sumter , blowing up a building; this was almost immediately followed by another shell, which scattered destruction all around. Fort Moultrie then took up the assault, and in another moment the guns from ...
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