In 1863, Abraham Lincoln proved himself a master of a new frontier with his “high-tech” command center — the War Department Telegraph Office, America’s first “Situation Room.” The telegraph, the internet of the 19th century, gave Lincoln the power to re-invent leadership and wield control across distant battlefields and have his finger on the pulse of the nation. This flow of communication led to some of the most dramatic moments of the Civil War, and shaped the words that Lincoln would use to reunite a shattered country at Gettysburg.