Oskar Steinmann was a Nazi colonel who oversaw the occupation of Guernsey during World War II. He obtained Bernice Summerfield's diary which she left on Guernsey. He tried to warn others about the future events described in it, but failed in altering history. (PROSE: Just War; AUDIO: Just War)

Following the end of the war, he was convicted of war crimes at the Nuremberg Trials. In 1969, after more than two decades in prison, he was released on medical grounds. He died in 1972. (PROSE: Just War)

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