Prior to money, what system of exchange was used to obtain necessary goods?

Bartering

Definition: to trade a commodity in exchange of another

This depends on the era, but some people would use shells to trade items or goods.

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Explanation:

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explanation:

gaius cassius longinus and marcus junius brutus, former enemies of julius caesar who'd joined the roman senate, led caesar's assassination, dubbing themselves "the liberators." and the second one is   the assassination of julius caesar was the result of a conspiracy by many roman senators led by gaius cassius longinus, decimus junius brutus albinus, and marcus junius brutus. they stabbed caesar (23 times) to death in a location adjacent to the theatre of pompey on the ides of march 15 march 44 bc.