[VeaVictis]

"If one million Chinese troops came across the Yalu, do you seriously believe that 50,000 US troops could stop the onslaught?"

Yes, there is no way to hide 1,000,000 troops nowadays. We would be fully prepared. They would have to swim across.

[bonesmccoy]

An interesting point. It suggests that the injection of PLA troops into the Korean conflict could have been handled differently if MacArthur had better recon. Is it correct to believe that Mac had no forewarning of PLA forces aligned against him? He certainly wanted to go across the Yalu.