It is SaO2 that measures oxygen saturation of hemoglobin, and it should be clear that it depends on the partial pressure of arterial oxygen. If PaO2 drops, there's less dissolved oxygen, and therefore less saturation of hemoglobin with oxygen.
The Cuban Missile Crisis was a propaganda victory for the United States and an undisclosed blow to containment. Some may contend that since the Soviet Union ultimately fell, the policy of containment was successful. This is an overly generous statement.
Containment would be successful in the beginning phases of the Korean War as the US-UN forces repelled the North Korean communists back across the 38th parallel. The second half of the Korean War, however, was conducted under the Eisenhower administration, which did not embrace a policy of brinkmanship.