How was having all forces on alert with air patrols up at dawn searching for the Japanese flat footed?
Korea, June, 1950.
Are you trying to say MacArthur was somehow responsible for the defense of Korea in June 1950, or are you trying to hide the fact that Truman, the president who turned China over to the reds, emboldened and reassured the communists by announcing that the US had no interests in Korea?
Korea, November, 1950.
What American commander in 1950 would not believe that an attack by China would be treated by Washington as an act of war?
They didn't need to look for the Nips. The Japs landed where expected. And the Japanese found the American and Filipino forces right where they expected.
Are you trying to say MacArthur was somehow responsible for the defense of Korea in June 1950,
The portion of the former Japanese territory of Korea south of the 38th parallel was within MacA's sphere of responsibility. KMAG was under the 8th Army.
What American commander in 1950 would not believe that an attack by China would be treated by Washington as an act of war?
One that thought strategically instead of tactically.