Abraham Lincoln (1809-1865), 16th PRESIDENT OF THE UNITED STATES. Lincoln entered office at a critical period in U. S. history, just before the Civil War, and died from an assassin's bullet at the war's end, but before the greater implications of the conflict could be resolved. He brought to the office personal integrity, intelligence, and humanity, plus the wholesome characteristics of his frontier upbringing. He also had the liabilities of his upbringing--he was self-educated, culturally unsophisticated, and lacking in administrative and diplomatic skills. Sharp-witted, he was not especially sharp-tongued, but was noted for his warm good humo