In the first phases of the war in the West, companies of 4th Cavalry saw action in various Missouri, Mississippi and Kentucky campaigns, as well as the seizure of Forts Henry and Donelson and the Battle of Shiloh. On 31 December 1862, a two-company squadron of the 4th Cavalry attacked and routed a Confederate cavalry brigade near Murfreesboro, Tennessee. In 1863–64, companies of the 4th saw further action in Tennessee, Georgia and Mississippi. On 30 June 1863, another squadron charged a six-gun battery of Confederate artillery near Shelbyville, Tennessee, capturing the entire battery and three hundred prisoners.