As the successor to his father, Hafez, Bashar al-Assad has continued with his father's brutal rule of Syria.

Kim Jong-un and Donald Trump met for a historic 5 hours of talks, signing a joint statement where the North Korean leader "reaffirmed his firm and unwavering commitment to complete denuclearization of the Korean Peninsula," while the U.S. president agreed to "provide security guarantees" to North Korea.

Joseph Stalin ruled the Soviet Union for more than two decades, instituting a reign of terror while modernizing Russia and helping to defeat Nazism.

Fidel Castro orchestrated the Cuban Revolution and was the head of Cuba's government until 2008.

Saddam Hussein was president of Iraq for more than two decades and is seen as a figurehead of the country's military conflicts with Iran and the United States.

Napoleon Bonaparte was a military general who became the first emperor of France. His drive for military expansion changed the world.

Mongolian warrior and ruler Genghis Khan created the largest empire in the world, the Mongol Empire, by destroying individual tribes in Northeast Asia.

Kim Jong Il's dominating personality and complete concentration of power has come to define the country North Korea.

Adolf Hitler was the leader of Nazi Germany from 1934 to 1945. He initiated fascist policies that led to World War II and the deaths of at least 11 million people, including the mass murder of an estimated six million Jews.

Francisco Franco led a successful military rebellion to overthrow Spain's democratic republic in the Spanish Civil War (1936—39), subsequently establishing an often brutal dictatorship that defined the country for decades.

Benito Mussolini created the Fascist Party in Italy in 1919, eventually making himself dictator prior to World War II. He was killed in 1945.

Rafael Trujillo was a dictator of the Dominican Republic for decades. He was assassinated in 1961.

Known for running a corrupt, undemocratic regime, Ferdinand Marcos was the president of the Philippines from 1966 to 1986 before fleeing to the United States.

Kim Il-sung served as premier and president of North Korea and ran the country for decades, spearheading the creation of an Orwellian regime.