During the reign of Augustus the boundaries of the empire were reinforced, favored in it's expansion, and created new important centers for spreading the Roman way of life.
The boundaries of the Roman Empire changed through major periods of expansion, especially under Augustus and during the Pax Romana, followed by contractions and divisions in the 3rd and 4th centuries. Ultimately, the Western Roman Empire fell in 476 CE due to invasions and loss of territories. The empire's evolution was shaped by military conquests, political shifts, and cultural integration.
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