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Big Era Five Patterns of Interregional Unity 300 ? 1500 C.E. Patterns of Interregional Unity Welcome to Big Era Five! Big Era Five lasted from 300 CE to 1500 CE. Big Era 2 300 CE ? 1500 CE Big Era 3 Big Era 5 Big Era 4 1800 CE 10,000 BCE 1000 BCE Big Era 6 Big Era 2 300 CE ? 1500 CE Big Era 3 Big Era 5 Big Era 4 1800 CE 10,000 BCE 1000 BCE During Big Era Five, many connections were established among regions. These formed interregional patterns of unity. Microsoft?Encarta?Reference Library 2002. ?1993-2001 Microsoft Corporation. All rights reserved. At the start of Big Era Five, numerous inventions, trade goods, ideas, and religions were starting to spread from their regions of origin. ?