yoavdothan,
How did you come up with the number 407,316?
I've taken a peek at the links you provided in your answer, and they don't seem to support your case. The site http://www.3ad.org/coldwar/coldwar_casualties.htm , for instance, opens with the following words:
"While the Cold War did not generally produce casualties as other wars do, many soldiers still lost their lives while serving on freedoms frontier. Most of the casualties died in training accidents"