For the question, the answer would be absolute horrible. They were only givein small, and i mean very very small rations of very stale bread and water, meaning they were starved and very dehydrated, they were whipped and beatin by SS and Gastopo soldiers and the dead would lay around, in some camps they would take the prisoners on what are called death marches to either where they would "work" or be killed by either fireing squad or gas chamber, if they didint die on the march, they were jam packed in there liveing quarters. When these camps were liberated at the end of the war by either American or Russian forces, they were described as basicly liveing hell, its smelled extremely bad from dead rotting bodys, thoes who were alive were so skinny they could see there bones, plus they were given basicly rags for clothing, and both men and women were shaved and were all given a number that was tattooed onto there forarm
Britian because america at the time was still not powerful enough to fight it alone without the help of the french soldiers