Categories - Civilizations, Cultures
- Achumawi
- Adena
- Adena Mound Builders Live in North America
- Ahtna
- Ais
- Alabama
- Alani Gain Power
- Aleut
- Aleutian Coastal Hunters Flourish
- Algonquin
- Alsea
- Anadarko
- Anasazi Civilization Flourishes in American Southwest
- Ancient Ghana Emerges
- Andronovo Culture Rises in Central Asia
- Angles, Saxons, and Jutes
- Apache
- Apache Tribe of Oklahoma
- Apalachee
- Apalachicola
- Arameans Emerge in Syria and Mesopotamia
- Arapaho
- Archaic
- Archaic Indians Adapt to Warmer Climates
- Arikara
- Assiniboine
- Atakapa
- Athenian Empire Is Created
- Atsina
- Atsugewi
- Avars
- Awatovi
- Aztalan
- Aztec
- Aztec Empire
- Babylonian Empire
- Ban Chiang Culture Flourishes in Thailand
- Bannock
- Basil II Conquers the Bulgars
- BaTwa Peoples Thrive in Central Africa
- Bayogoula
- Beaker People Live in Western Europe
- Beaver
- Bella Bella
- Bella Coola
- Beothuk
- Berber Kingdoms of Numidia and Mauretania Flourish
- Berbers Expand Across North Africa
- Bering Strait Migrations
- Biloxi