Why do the president, members of congress, and federal judges take an oath to defend the constitution of the united states?

Brainliesttt !me : ) why were the eastern european countries attempting to break free of the soviet union?

Which country was the first to industrilzalize on the content of europe

Historians use periodization in order to: a. decide when a certain historical even took place. b. divide history into units with distinct start and end dates. c. criticize arguments made about the past. d. organize history into different timelines