The Civil War begins with
Union and Confederate armies fighting at Manassas and Wilson's Creek.
Southern armies under P. G. T. Beauregard
defeat Union forces commanded by
Irvin McDowell in Manassas, VA on July 21,1861.
In the west,
Brig. Gen. Nathaniel Lyon
is killed at Wilson's Creek, MO on August 10, 1861.
The victory by the Southern troops gave the
Confederates control of southwestern Missouri.