What year was the Battle of Bull Run?

On December 30, the Union force moved into line two miles (3 km) northwest of Murfreesboro. The two armies were in parallel lines, about 4 miles (6 km) long, oriented from southwest to northeast. Bragg's left flank was weak at the start and Rosecrans could have attacked there when he arrived and wheeled left, around the flank and directly into the town of Murfreesboro, but he did not know the full disposition of Bragg's forces, due in part to the skillful screening of the Confederate cavalry during the Union march. In a manner similar to the previous year's First Battle of Bull Run, both commanders devised similar plans for the following day: envelop the enemy's right, get into his rear, and cut him off from his base. Since both plans were the same, the victory would probably go to the side that was able to attack first. Rosecrans ordered his men to be ready to attack after breakfast, but Bragg ordered an attack at dawn.