In July 1890, which territory, now famous for its potatoes, joined the Union as the 43rd state?

Who reigned as King of Prussia and German emperor from 1888 to 1918? Which 1889 Mark Twain novel sends a 19th-century American back to Camelot? Which 1889 disaster killed over 2,200 people in Pennsylvania when the South Fork Dam failed? Which artist painted "The Starry Night" in 1889 and died in 1890? Forced to resign by Kaiser Wilhelm II in 1890, which "Iron Chancellor" retired to his estate at Friedrichsruh? Penobscot outfielder Louis Sockalexis, who played in the 1890s, was said to have inspired which name for Cleveland's ba… Which artist's 1890s paintings include "Melancholy," "Jealousy" and "The Scream"? In the 1890s, U.S. maps showed the "Twin Territories": Oklahoma Territory and which other territory?