The answer to your question is gunpowder weapons.
siege warfare.
armored cavalry.
Hoped I Helped!
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Augustus took Julius Caesars place
In 1868 the Tokugawa shôgun ("great general"), who ruled Japan in the feudal period, lost his power and the emperor was restored to the supreme position. The emperor took the name Meiji ("enlightened rule") as his reign name; this event was known as the Meiji Restoration.