Joseph E. Johnston orders the Confederate Army of the Potomac to withdraw from Centerville/Manassas to the Rappahannock River based on reports from JEB Stuart of increased Yankee activity
Abraham Lincoln, chagrined at George McClellan for not appointing corps commanders, names Edwin Vose Sumnner, Samuel Heintzelman, Erasmus Keyes and Irvin McDowell for him.
After withdrawing from New Madrid Confederates control Island No. 10, blocking shipping on the Mississippi. Over 5,000 Confederate soldiers on the island surrender to Major General John Pope on April 8.