Earthquake in the Aegean Sea which caused widespread destruction in the Middle East, North Africa and Southern Europe.

Conflict in California in 1856

Last major battle of the Rogue River Wars, in the US

1856 battle of the Dominican War of Independence (1844–1856)

Attack by Native Americans upon Seattle in 1856

1856 Filibuster War battle in Nicaragua

Treaty of Paris — 1856 treaty

1856 riot in Panama City

Unequal treaty in modern-day Thailand

1856 battle during the Bleeding Kansas era

Earthquakes in northern Algeria