<span>In July 1836, Andrew Jackson issued the Specie Circular, which required that public lands be purchased using "gold or silver," since it was thought that this would be better for the US economy. </span>
Yes it does look expensive...
Lichtenstein's comic book style is characterized by the use of a dot pattern, known as the Benday dot. He started using this system in 1961, and, although it became a signature element of his art, the system had been invented in 1879 and had already been used in comics, newspapers and billboards. Lichtenstein made the dots very big, almost to the point of exaggeration. The use of thick lines, as well as the bright colors are also elements that appear in billboards and comic books.
Vicksburg was the last stronghold until the Union could have the Mississippi River. If they were to take Vicksburg, they would split the Confederacy and go along with their Anaconda Plan. They did so by starving Vicksburg to surrender.