Answer:
September 1, 1939.
Explanation:
He launched the invasion, also fueling the beginning of world war 2.
The answer you are looking for is <span>the advent of agriculture</span>
The development of time zones helped a lot to make the train schedules more reliable, because the time zones can create a standard time that all train can use so that they can be unified, and would make a standard that all trains can follow and not be confused by the time in their respective places.
Answer:
Index
Explanation:
a list (as of bibliographical information or citations to a body of literature) arranged usually in alphabetical order of some specified datum (such as author, subject, or keyword):