The "reds" and the "yellows" - Political cartoon, public domain image

William McKinley (January 29, 1843 – September 14, 1901) was an American politician and lawyer who served as the 25th President of the United States from March 4, 1897, until his assassination in September 1901, six months into his second term. McKinley was the last president to have served in the American Civil War. He promoted the tariffs to protect manufacturers from foreign competition, and in 1900, he secured the passage of the Gold Standard Act. He led the nation in the Spanish–American War of 1898: the U.S. victory was quick and decisive. "The mission of the United States is one of benevolent assimilation."

Alois Senefelder, the inventor of lithography, introduced the subject of colored lithography in 1818. Printers in other countries, such as France and England, were also started producing color prints. The first American chromolithograph—a portrait of Reverend F. W. P. Greenwood—was created by William Sharp in 1840. Chromolithographs became so popular in American culture that the era has been labeled as "chromo civilization". During the Victorian times, chromolithographs populated children's and fine arts publications, as well as advertising art, in trade cards, labels, and posters. They were also used for advertisements, popular prints, and medical or scientific books.