Explanation:
Significance. The barbarian kingdoms marked the transition from Late Antiquity to the Early Middle Ages in the 6th and 7th centuries, gradually replacing the Roman system of government on the lands of the Western Roman Empire, notably in the two western prefectures of Gaul and Italy.
The Yalu River also known by Koreans as the Amrok River or Amnok River. It is a river on the border between North Korea and China.
The correct answer is Lyndon B. Johnson
The term for the significant growth in population following WWII is the "baby boom." We also now refer to those people as "baby boomers"