Abraham Lincoln was the 16th president of the United States from 1861 until his assassination in 1865. He led the nation through the American Civil War, which is considered to be the greatest crisis in U.S. history. He saved the Union, abolished slavery, enforced federal government, and modernized the U.S. economy.

Frederick Douglass was an American social reformer, abolitionist, orator, writer, and statesman. After escaping slavery, he became the leader of the abolitionist movement in Massachusetts and New York. His antislavery speeches and writings made him famous, and he was described in his time as a living counterexample to slaveholders' arguments that slaves lacked the intellectual capacity to function as American citizens.

Napoleon Bonaparte became famous during the French Revolution, as he led several successful campaigns during the Revolutionary Wars. He became the de facto leader of the French Republic as First Consul from 1799 to 1804. He became the Emperor of the French from 1804 to 1814, and in 1815. He was one of the most important politicians and military leaders of the 18th and 19th centuries.

Benjamin Franklin was one of the Founding Fathers of the United States. He was a writer, printer, political philosopher, politician, postmaster, scientist, inventor, humorist, civic activist, statesman, entrepreneur, and a diplomat. He was an ideal renaissance man leading the American Enlightenment.

Gaius Julius Caesar is probably the most famous and influential general and statesman in Roman history, who was a key catalyst in the demise of the Roman Republic and the rise of the Roman Empire. He was assassinated during the session in the Senate by a conspiracy led by Brutus and few other senators.

Thomas Jefferson was an American statesman, diplomat, lawyer, architect, philosopher, Founding Father, and served as the third president of the United States from 1801 to 1809 for two full terms. He was also the principal author of the Declaration of Independence, an advocate of democracy, republicanism, and individual rights.

Andrew Jackson was the seventh president of the United States, serving from 1829 to 1837 for two consecutive terms. Jackson rose to prominence as a general in the U.S. Army. He also served in both houses of the U.S. Congress. He sought to advance the rights of the "common man" against a "corrupt aristocracy" and to preserve the Union.

Sir Winston Leonard Spencer Churchill was the Prime Minister of the United Kingdom from 1940 to 1945, during the Second World War, and again from 1951 to 1955. Apart from being known for being a wartime leader, Churchill was also a Sandhurst-educated soldier, a Nobel Prize-winning writer and historian, a prolific painter, and one of the longest-serving politicians in British history.

Mao Zedong, also known as Chairman Mao, was a Chinese communist revolutionary and the founder of the People's Republic of China, who ruled as the chairman of the Chinese Communist Party from its establishment in 1949 until his death in 1976.