Analysis of information sources in references of the Wikipedia article "Kirk Douglas" in English language version.
Serving in the Pacific as an ensign, he was seriously injured because of a premature depth charge explosion and returned to San Diego. After five months hospitalization, he was granted a medical discharge in 1944.
...it was Otto Preminger, the director, who broke the blacklist months later by publicly announcing that he had hired Mr. Trumbo to do the screenplay