...nnock until the latter part of April. The Federal army occupied the north side of the river opposite Fredericksburg, extending to the Potomac. Two brigades of Anderson's division — those of Generals Mahone and Posey--were stationed near United States Mine or Bark Mill ford; and a third, under command of General Wilcox, guarded Banks' ford. The cavalry was distributed on both flanks — Fitzhugh L...