On the west side of Saipan, the 2d Marine Division had a memorable day on 25 June. In a series of brilliant tactical maneuvers, with a battalion of the 8th Marines clawing up the eastern slope, a battalion of the 29th Marines (then attached to the 8th Marines) was able to infiltrate around the right flank in single file behind a screen of smoke and gain the dominating peak without the loss of a single man. Over the next several days the 8th Marines encountered four small hills strongly defended by the enemy. Because of their size in comparison with Mount Tapotchau, they were called "pimples." Each was named after a battalion commander. Painfully, one by one, they were assaulted and taken over the next few days.