Just nuke it, what a simple solution

For anyone who wonders why Macarthur and Nukes are connected, Macarthur's proposal to end the Korean War as a decisive American Victory involved 30 nuclear warheads, and 30 civilian targets. The second part of his plan, was to have a massive quick moving force of trucks and such carrying irradiated cobalt dust after the bombs were dropped, to cover the 200 mile strip between North Korea and China. His reasoning for the first part? They wouldn't have anything left to fight if everything was obliterated. His reasoning for the second part of his plan? The Chinese military had absolutely no form of CBRN or radiation protection for their troops, thus if the CCP wanted to try to deny the Americans any headway into winning the territory, they wouldn't last.