Their were more than 5 but here are some known concentration Camps
Auschwitz I
Birkenau
Monowitz
Sobibor
Dachau
Chelmno
Treblinka
Their was only about 20 Major concentration camps.
Concentration Camps Transit Camps Labour Camps Death Camps Extermination Camps.
no.
world war 2
Boner
In World War 1 (1914-18) there were no concentration camps. For the Nazi concentration camps, see the related question.
The answer posted previously was wrong; there were concentration camps during WWI. The Turks had the Armenians in concentration camps such as Deir ez-Zor during WWI. Around 1.5 million Armenians were killed in that genocide total.
No conflict caused concentration camps during WWII. Nazi Concentration Camps pre-dated WWII, though when Germany too over more territories they built more camps.
By 1944 Nazi had 13 main concentration camps and over 500 satellite camps. The concentration camps were not just to murder people but also for free slave labor.
good
Birkenau and Treblinka.
It was painful. It was painful.