The term "concentration camp" really only came to mean "death camp" during/after WWII. Before then it was used more or less literally, a camp where people are

The term "concentration camp" really only came to mean "death camp" during/after WWII. Before then it was used more or less literally, a camp where people are concentrated (which is not to say that they were not often brutal and deadly... but the purpose of the camps was not extermination)