question: What tactics of the PVA were US and ROK troops not prepared to handle ?
answer: PVA 9th Army Group 's three-pronged encirclement tactics
turker_answer: US and ROK troops were not prepared to handle the PVA 9th Army Group 's three-pronged encirclement tactics .
rule-based: US and ROK troops were not prepared to handle PVA 9th Army Group 's three-pronged encirclement tactics .