One of the Great Campaigns of the American Civil War series modules.
This one covers Ambrose Burnside's attempt to cross the Rappahannock River in late 1862, a campaign which ended with the Battle of Fredericksburg. Necessary command counters are from The Skirmisher #2 and the maps from Stonewall's Last Battle: The Chancellorsville Campaign and Grant Takes Command.
This module is found in The Skirmisher #2.