Who helped to unite Korea under the silla king???

In 672, Silla unified the three kingdoms by winning the war against the Tang Dynasty. It became the first country to unify its territory on the Korean Peninsula.

Explanation:

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions