Germany's resumption of unrestricted submarine warfare
Demographics=Data relating to the population and particular groups within it.
Swing State=A state that plays an unpredictable but important role in national politics.
Pivotal=Of high importance.
Tourism=The practice of traveling, usually for vacation or sightseeing.
In 1776, the Thirteen Colonies declared their independence from Britain. With the help of France and Spain, they defeated the British in the American Revolutionary War. In the Treaty of Paris (1783), Britain officially recognized the independence of the United States of America.
Answer:
Absolute dating
Explanation:
They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened. The geologic time scale is divided into eons, eras, periods, and epochs.