Decades: 910s BC 900s BC 890s BC 880s BC 870s BC - 860s BC - 850s BC 840s BC 830s BC 820s BC 810s BC

• 865 BC - Kar Kalmaneser was conquered by the Assyrian king Shalmaneser III
• 864 BC - Diognetus, King of Athens dies after a reign of 28 years and is succeeded by his son Pherecles.
• 863 BC - The city of Bath is founded. It is named after the leprosy-curing hotsprings there.
• 860 BC - The kingdom of Urartu is unified.