along the Cape Fear River. A Confederate division under Major General Robert Hoke occupied the Sugar Loaf Line north of Fort Fisher. On February 11 Schofield attacked Hoke's Sugar Loaf Line with Alfred Terry's corps; the engagement started in the morning with a bombardment by Union gunboats along the Atlantic side of the fortifications. A half-hour later, Terry started his advance but his left wing was hindered by a swamp located along the river. By late afternoon, Schofield and Terry had overrun the Confederate skirmish line but then concluded that the main Confederate works were too strong to be captured by frontal assault; Schofield decided that he had to capture Wilmington from the western side of the river. Next, Major General Jacob D. Cox's 3rd Division, XXIII Corps was ferried to the west bank of the Cape Fear River to deal with Fort Anderson, the main fortress guarding Wilmington. Fort Anderson Rear Admiral David D. Porter's gunboats sailed up the river and shelled Fort Anderson silencing all twelve guns. Under the direction of Lt. Commander William B. Cushing the Federal Navy constructed a Quaker (or fake) monitor to trick the Rebels into detonating their water mines to make way for Porter's gunboats. Both Cushing and Porter were highly pleased with the success of the ploy. However, later Confederate reports claimed the garrison was expecting a dummy boat and were prepared. Meanwhile, Cox, supported by General Adelbert Ames' division, advanced up the west bank towards the fort. Cox sent the brigades of Colonel Thomas J. Henderson and Colonel Orlando Moore against the garrison itself while Brig. General John S. Casement and Col. Oscar Sterhl marched through the swamps around the Confederate flank. Casement and Sterhl encountered Confederate cavalry and pushed it back after a short fight. The fort's commander, General Johnson Hagood sensed the trap and received permission from Gen. Hoke to pull back to a defensive line along Town Creek to the north. Just as Hagood's troops began their retreat, Henderson's brigade attacked, thus taking the fort rather easily along with a few prisoners. Town Creek Cox pursued Hagood from Fort Anderson, and on February 19 caught up to the Town Creek Line while Hoke's division retreated to a position three miles south of Wilmington, across the river from Hagood's force. Terry followed Hoke cautiously, worried about being surprised by an ambush or by a flank attack from his right.