Henry W. Halleck issues General Orders as part of his Federal program to suppress alleged disloyalty in Missouri.
Federals under John Pope overwhelm a force of Missouri State Guards and demoralize secessionists in the western part of the state.
Sterling Price sends another message to Jefferson Davis asking him to provide more support for their secessionist cause in Missouri.
John C. Fremont touts the recapture of Lexington and Springfield as great victories, but they do little to change the tumultuous military situation in Missouri.
M. Jeff Thompson leads 3,000 secessionist Missourians in disrupting Federal operations and engaging in several skirmishes in southeastern Missouri.
John C. Fremont leaves St. Louis to lead his Army of the Southwest against the secessionist Missouri State Guards of Sterling Price.