1856 battle during the Bleeding Kansas era

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

Earthquakes in northern Algeria

1856–1860 war between British–French forces and China