April 8 – Confederate General Richard Taylor defeats Banks at Sabine Crossroads, Louisiana.
April 10 – The only U.S. female surgeon – Mary Edwards Walker – is captured by Confederates south of the Tennessee-Georgia border.
April 12 – Confederate cavalryman, General Nathan Bedford Forrest captures Fort Pillow (TN) on the Mississippi River. Surrendered U.S. Colored Troops are massacred, sending shock waves throughout the country.
See the complete Civil War Timeline here.