But in the spring of 1945, photographs and eyewitness accounts from the liberation of camps like Bergen-Belsen afforded the disbelieving world outside of Europe its first glimpse into the abyss of Nazi depravity. All these years later, after countless reports, books, oral histories and documentary films have constructed a terrifyingly clear picture of the Third Reich’s vast machinery of murder, it’s difficult to grasp just how shocking these first revelations really were. The most horrific rumors about what was happening to the Jews and millions of other “undesirables — Catholics, pacifists, homosexuals, Slavs — in Nazi-occupied lands paled before the reality revealed by the liberation of the camps.
Here, on the anniversary of the April 15, 1945, liberation of Bergen-Belsen by British troops, LIFE.com presents a series of photographs made at the camp by the great George Rodger (later a founding Magnum member). In an issue of LIFE published a few weeks later, in which several of the pictures in this gallery first appeared, the magazine told its readers of a “barbarism that reaches the low point of human degradation.”