Actually, several. The most commonly referred to as being interred would have been Japanese Americans during WWII. Some Germans were detained during WWI and WWII. And, lest we forget, the Native Americans have been held on reservations for about 150 years--the term "concentration camp" generally refers to the relocation and death camps of Nazi Germany during WWII; Hitler actually borrowed the American idea of NA reservations, and actually called the first camps reservations when they were first opened.
Jews
jews
Under an Executive Order, Americans interred Japanese-Americans.
There was a female group and a male group. It didn't matter how old you were, if you were a female you would be put into a female concentration camp or if you were a male, you would be transferred to a male concentration camp.
At first (until July 1934) the Nazi concentration camps were run by the SA (Stormtroopers, 'Brownshirts'), but from mid 1934 they were run by the SS. Later the SS was also in charge of the 'Final Solution' and ran the extermination camps in Poland. The concentration camps were run by the SS-Totenkopfverbände (SS Death's Head units).
Jews
No. Tattooing was only done at the Auschwitz group of camps.
Well technically the first groups affected by the Concentration Camps were Criminals and Political Opponents of the Nazi Party. However, the earliest and most effective group to be effected by the Concentration Camps were the Jews.
To identify which group of Jews they came from.
jews
Under an Executive Order, Americans interred Japanese-Americans.
The Nazis were a group of people that followed Hitler, and put the Jew's in concentration camps.
Jews, Gypsies, and people who offended the Nazis.
Mauthausen was a group of exceptionally harsh concentration camps in Austria. (Other well known camps in the group included Ebensee and Gusen).
There was a female group and a male group. It didn't matter how old you were, if you were a female you would be put into a female concentration camp or if you were a male, you would be transferred to a male concentration camp.
The first religion was actually the Roma (Gypsies) to be put in concentration camps not the Jews.
concentration camps. ^ wrong! It's a Colony