 Near the end of the month two reconnaissance patrols from the 9th Infantry had crossed to the west side of the <unk> and observed North Korean tank and troop activity 2 miles ( 3 @.@ 2 km ) west of the river . Information obtained later indicated it was in fact the command post of the <unk> 9th Division . On August 25 , 9th Infantry commander Colonel John G. Hill outlined projected " Operation <unk> , " which was to be a company @-@ sized combat patrol to cross the river , advance to the suspected North Korean command post and communications center , destroy it , capture prisoners , and collect intelligence . 
