Hannibal, son of Hamilcar Barca (247 – 183/182 BC) was a Punic Carthaginian military commander and tactician, generally considered one of the greatest military commanders in history. His father, Hamilcar Barca, was the leading Carthaginian commander during the First Punic War, his younger brothers were Mago and Hasdrubal, and he was brother-in-law to Hasdrubal the Fair.

Hannibal lived during a period of great tension in the Mediterranean, when the Roman Republic established its supremacy over other great powers such as Carthage, the Hellenistic kingdoms of Macedon, Syracuse, and the Seleucid empire. One of his most famous achievements was at the outbreak of the Second Punic War, when he marched an army, which included war elephants, from Iberia over the Pyrenees and the Alps into northern Italy. In his first few years in Italy, he won three dramatic victories—Trebia, Trasimene, and Cannae—and won over many allies of Rome. Hannibal occupied much of Italy for 15 years, but a Roman counter-invasion of North Africa forced him to return to Carthage, where he was decisively defeated by Scipio Africanus at the Battle of Zama. Scipio had studied Hannibal's tactics and brilliantly devised some of his own, and finally defeated Rome's nemesis at Zama, having previously driven Hasdrubal, Hannibal's brother, out of the Iberian Peninsula.

Hannibal Hamlin (August 27, 1809 – July 4, 1891) was the 15th Vice President of the United States (1861-1865), serving under President Abraham Lincoln during the American Civil War. He was the first Vice President from the Republican Party.

Prior to his election in 1860, Hamlin served in the United States Senate, the House of Representatives, and, briefly, as the 26th Governor of Maine.

Hamlin was born to Anna (née Livermore) and Cyrus Hamlin in Paris, Maine. He was a descendant in the sixth generation of James Hamlin who had settled in the Massachusetts Bay Colony in 1639. Hamlin was a great nephew of U.S. Senator Samuel Livermore II of New Hampshire,^{[citation needed]} and a grandson of Stephen Emery, Maine's Attorney General in 1839–1840.

Hamlin attended the district schools and Hebron Academy and later managed his father's farm. For the next few years he worked at several jobs: schoolmaster, cook, woodcutter, surveyor, manager of a weekly newspaper in Paris, and a compositor at a printer's office. He studied law and was admitted to the bar in 1833. He began practicing in Hampden, a suburb of Bangor, where he lived until 1848.

Abraham Lincoln ⁱ/ˈeɪbrəhæm ˈlɪŋkən/ (February 12, 1809 – April 15, 1865) was the 16th President of the United States, serving from March 1861 until his assassination in April 1865. He successfully led his country through its greatest constitutional, military and moral crisis – the American Civil War – preserving the Union while ending slavery, and promoting economic and financial modernization. Reared in a poor family on the western frontier, Lincoln was mostly self-educated. He became a country lawyer, a Whig Party leader, Illinois state legislator in the 1830s, and a one-term member of the United States House of Representatives in the 1840s. After a series of debates in 1858 that gave national visibility to his opposition to the expansion of slavery, Lincoln lost a Senate race to his arch-rival Stephen A. Douglas. Lincoln, a moderate from a swing state, secured the Republican Party nomination. With almost no support in the South he swept the North and was elected president in 1860. His election was the signal for seven southern slave states to declare their secession from the Union and form the Confederate States of America. The departure of the Southerners gave Lincoln's party firm control of Congress, but no formula for compromise or reconciliation was found. And the war came.