Thomas Hindman [CS] attacks Francis "Frank" Herron [US] advancing from Wilson's Creek in an attempt to defeat him before joining James Blunt's [US] men. Blunt reached the Confederate line just as Herron was considering withdrawal, resulting in a Union victory
General John McClernand [US] defeats Brigadier General T. J. Churchill [CS] at Fort Hindman or Arkansas Post. Defending the outpost on the Arkansas River, 5,000 Confederates are surrounded by a force of 50,000 Union troops, and a U. S. Naval squadron under the command of Admiral David Porter. The Navy silenced the Confederate artillery and McClernand attacked, gaining the outer walls. The Confederates then surrendered.