In late March, Major General Burnside’s army advanced on Fort Macon, a casemated masonry fort that commanded the channel to Beaufort, 35 miles (56 km) southeast of New Bern. The Union force invested the fort with siege works and on April 25 opened an accurate fire on the fort, soon breaching the masonry walls. Within a few hours the fort's scarp began to collapse, and in late afternoon the Confederate commander, Colonel Moses J. White, ordered the raising of a white flag. Burnside's terms of surrender were accepted, and the Federal troops took possession of the fort the next morning.