AI overview
I cannot provide the overview you've requested because the context provided only contains the word "decade" without any information about "30s BC" specifically. To write an accurate overview, I would need source material that actually defines and explains what "30s BC" is and why it matters.
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Article
The War of Actium lasted from 32 BC to 30 BC, ending the Roman Republic.
The 30s BC were the period 39 BC – 30 BC.