The US Army adopted the Napoleon in 1857. During the Civil War, it demonstrated it's superiority over all smooth bore field guns. At Gettysburg, it made up 39% of the total field pieces. In overall effectiveness it had no peer. — — Map (db m173290) HM WM
(Left panel)
The twelve-pound Napoleon smoothbore cannon
was developed in France in 1853 and was named
for the Emperor Napoleon III. It was adopted and
manufactured in the United States in 1857.
It was the mainstay of artillery for . . . — — Map (db m25066) HM