1st Provisional Marine Brigade
On September 5th, a 10 minute long artillery preparations, the Americans started to move out even if it was a day of rain. They moved to Obong-ni Ridge and the 9th Infantry came close to Cloverleaf Hill that was recently captured in the First Battle of Naktong Bulge. They saw some North Koreans going up and then the marines split and took the pass between both hills.