The American Civil War (1861-1865). In it's most heated year the Civil War most likely cost over 300 fatalities per 100,000 citizens a year. This is not counting those who died from disease. Since it is also one of the only wars to have taken place on US soil, it can also be safely assumed to be the costliest in terms of monetary damage as well.
The next most deadly conflict was WW2 which cost the US about 10-140/per 100,000 citizens each year. In descending order, other costly conflicts were...
American Revolution
War Of 1812
Korean Conflict
http://www.violentdeathproject.com/
The most destructive tornado in U.S. history was the Joplin, Missouri tornado of May 22, 2011. The cost of damage was $2.8 billion.
The French and Indian War was the longest US war before 1850.The longest US war in history was the Vietnam War.
The Civil War (Over 650,000 deaths)
We can not answer your question because you have not specified which country's civil war you are asking about. Most countries have had a civil war at some time in their history. Please make your questions clear and specific if you want us to answer them for you.
it was the period after the civil war when we were rebuilding our country
it was the alamcatoah
Probably the Civil War was because the most Americans killed in any war was our own Civil War fought between the Northern and Southern states between 1861 - 1865.
The most destructive earthquake in US history was the Prince William Sound earthquake. This earthquake did extensive damage across the Gulf of Alaska.
New york
California
While certainly an important event in US history, the US Civil War didn't "lead" or "start" the study of US History.
The nuclear bomb AKA the cold war. The cold war was an arms race against the USSR and the US to see who could get the most destructive and best nuclear weapon of all time.
The Us Civil War was the bloodiest war recorded in US history.
The statement that US history is not taught past the Vietnam War is not correct. US colleges and secondary schools have quite different US history boundaries. There is a mass of US history running past the War in Vietnam.
The most destructive hurricane in US history is considered to be Hurricane Katrina, which hit the Gulf Coast in 2005. It caused widespread devastation in Louisiana, particularly in New Orleans, and resulted in over 1,800 fatalities and billions of dollars in damages.
The Library of Congress in Washington DC has many thousands of government records. Without a doubt, the history of tariffs can be found there covering the US Civil War and most of US history.
Civil War's "California Joe" and the Vietnam War's "Carlos Hathcock."