The Battle of Wilson's Creek
August 10, 1861

Soon after the shocking Union defeat at Bull Run, Federal forces in the West maneuvered to gain control of Missouri, a strategic border state with a pro-Confederate militia. At Wilson's Creek, near Springfield in southwestern Missouri, two attacking Union columns (7,000 men - BG Nathaniel Lyon from the north and BG Cal Franz Sigel from the south) were repulsed (Lyon fatally wounded) by counterattacking Confederate forces (12,000+ men - BG Benjamin McCulloch, regular infantry). Wilson's Creek, the first major battle of the War west of the Mississippi, led to an intensified struggle for Missouri's divided allegiance, which eventually resulted in a Union victory. Estimated Casualties: Union - 1,317; Confederate - 1,222.


Notes:

  1. Numbers in parentheses reflect estimated strength of armies or units.

  2. Estimated casualty figures are totals for killed, wounded, missing in action, and taken prisoner.

  3. Alternative names of battles and campaigns appear in parentheses.

  4. Military and naval rank abbreviations in text: LT - Lieutenant, CPT - Captain, MAJ - Major, LTC - Lieutenant Colonel, CDR - Commander (Navy), COL - Colonel, BG - Brigadier General, MG - Major General, RADM - Rear Admiral (Navy), LTG - Lieutenant General, VADM - Vice Admiral (Navy), and GEN - General.

  5. Army Organization: Although authorized and actual strength and the rank of the commanding officer often varied, the standard military unit during the War was the infantry regiment (1,000 men, COL commanding) which was comprised of 10 companies (100 men each, CPT commanding). 3-4 Regiments = 1 Brigade (3,000-4000 men, BG commanding). 3 (sometimes 4) Brigades = 1 Division (9000-12,000 men, BG or MG commanding). 2-4 (usually 3) Divisions = 1 Corps (18,000-24,000+ men, MG - North and MG or LTG -South commanding). 2 or more Corps = An Army (usually 20,000-100,000+ men - MG, LTG, or GEN commanding). 2 or more Armies = An Army Group (usually 100,000+ men - MG, LTG, or GEN commanding).


Sources:


Photographs courtesy of The Generals of the American Civil War Website.


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