American security entered the equation when China entered the Korean war, a development that President Truman said put the United States in “grave danger” from “Communist aggression.” Doubtless General MacArthur’s crossing of the 38th parallel into Communist-held territory—the action which provoked the Chinese entry—put China’s security in grave danger from the Chinese point of view, but the opponent’s point of view is rarely considered in the paranoia of war. From
