A Primary source is any source that was created at the time of the historical period that you are investigating.
A secondary source is created after the time period of the event or historical period.Examples: Movie, textbook. biography
We have far more many assets to assert, prove, list and date our modern history, with things like videos, audios, news sources and other sources.
The USA was scared that if another country were to fall to communisim that soon many other countries would fall as well.
