How many kinds of 1872 seated liberty dollars exists?

There are two types of Seated Liberty dollars minted in 1872: the "No Stars" variety and the "With Stars" variety. The "No Stars" variety does not have stars on the obverse (front) of the coin, while the "With Stars" variety has seven stars.

Was there any kid slaves during the civil war?

What did the Civil Rights Act of 1866 do?

Radiography of Independence:The American Revolution, by Bernard Cottret
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Fragging and fracking, two dangerous American fads
What is fragging? During the Vietnam War, between 1964 and 1975, a curious and dangerous phenomenon occurred within the US Army:the so-called fragging (act of attacking a superior in the chain of command with the intention of frightening or killing him, usually using fragmentation grenades; hence
The life of John Nash, a genius mathematician who became a model for the movie A Beautiful Mind
I just saw Beautiful Mind. As of June 2019, when this article is written, it can be seen on Amazon Prime, so if you havent seen it yet, please take a look. From the impression of Beautiful Mind The life of John Nash Thinking about John Nashs life From the impression of Beautiful Mind
In chiaroscuro:Richard Nixon, by Antoine Coppolani
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