Around 6 million Jewish people were killed.
Commodore Matthew Perry's expedition in 1853 to Tokyo to force trade with Japan displayed the use of "gunboat diplomacy" by the united states, since the United States was threatening (by implication) to use force if diplomacy failed.
Slavery would’ve probably been around a lot longer
Hernan Cortes is a Spanish conquistador and explorer who defeated the Aztec empire and claimed Mexico for Spain.