Vladimir Putin is one world leader who has studied history thoroughly. In a recent address, Putin discussed America’s plan to annex Greenland and explained that it is not some “extravagant plan” that Trump imagined. In fact, the United States had plans to annex Greenland going back to the 1860s. Secretary of State William H. Seward was keenly in favor of annexing Iceland and Greenland in the 1860s as part of American expansionism. Not only was Greenland abundant in minerals, fish, and game, but it provided a strategic military base. Denmark was willing to listen to the proposal and considered selling...