How were the Mongols able to create a large empire, and why did it collapse?

The Mongols were able to establish a massive empire due to their unique military tactics, their brutality, and their discipline. The Mongols used their unorthodox military tactics to their advantage in conquering neighboring civilizations, helping them to form their large empire

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.

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