Operation Tomahawk
Operation Courageous was designed to trap large numbers of Chinese People's Volunteer Army ( PVA ) and Korean People's Army ( KPA ) forces between the Han and Imjin Rivers north of Seoul , opposite the Republic of Korea Army ( ROK ) I Corps . 
<triplet> Han <subj> Imjin River <obj> tributary <triplet> Seoul <subj> Han <obj> located in or next to body of water <triplet> Republic of Korea Army <subj> I Corps <obj> subsidiary <triplet> I Corps <subj> Republic of Korea Army <obj> parent organization