https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13954710
The bombardment and capture of Island 'Number Ten' on the Mississippi River, April 7th 1862: Federal gunboats and mortar boats are shown firing at the Confederate fortifications on the island. Colour lithograph, 1862.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use