The Battle of Fredericksburg was apparently one of the deadliest and biggest of the Civil War. It was battled December 11-15, 1862. Battle of Fredericksburg did include the first major restricted river crossing in the military history of America. Confederate and Union troops fought in the boulevards of Fredericksburg, the Civil War's first urban battle. What's more, with about 200,000 warriors, no other Civil War battle included a bigger grouping of troopers. Ambrose Burnside, who was the newly appointed commander of the Potomac Army, ordered over 120,000 troops to cross the River of Rappahannock, where they made a two-dimensional assault on the flanks of Robert E. Lee's Army of Northern Virginia. Fredericksburg’s Battle was a devastating thrashing for the Union, whose officers battled gallantly, but did, unfortunately, fall victim to their commanders’ mismanagement, which included befuddled orders from Burnside to Franklin. More so, Burnside did accept the responsibility for the annihilation, although numerous pointed the finger at Lincoln for forcing him to proceed with an impossible and incomprehensible offensive. Conclusively, in the surge of political recriminations that took after, a greater part of Republican senators did vote to expel William Seward (the Secretary of State) who had turned into the essential focus for their disappointments over the organization's behavior of the war. In January 1863, Joseph Hooker was appointed by the president to replace Burnside as commander of the Potomac Army.