The unity of the U.S. currency was lost with the Civil War.

the German currency Deuchmarks

Germany's currency during World War 2 was the Reichmark .

the currency that was printed during the revolutionay war was the commodity money

Depends on which part of the 18th century about which you are talking. Pre-Revolutionary War or post?

Pre-Revolutionary War - Colonial governments issued paper currency; foreign coins were also used.

Revolutionary War - Colonies continued to issue paper currency to cover military expenses. The Continental Congress also issued Continental currency. Both were practically worthless by the end of the war.

Post-Revolutionary War - The Constitution barred states from issuing their own currency and the federal government took on currency issuance. The government began to issue currency after ratification of the Constitution.