Since you didn't tell us what "this time period" might be, we cannot answer the question.
The civil war was fought in this time period.
Referring to or making a timeline can help you remember when an event happened, especially in relation to other similar events or other events that happened at a similar time.
Victorian era?
a period
1920s
Study Island: The roarin' twenties! Yay gangsters and flappers!
Phosphate is not a period of time during which an event can occur.
The civil war was fought in this time period.
shays rebellion
your mama was born
a phase is a period of time when an event happened. 'phased' must mean that event has passed. it WAS a phase. as in this is going to be phased soon.
secondary source
One big event that happened in America during World War 1 was that the economy started to improve. Industry also picked up during this time.
Many historical things happened during that time period. The most remarkable ones were The Panama Canal, the 16th amendment, the SF earthquake and the Russo-Japanese War.
well the ww2 carried on during this period of time....
the Mexican war
secondary source