March 31 1861 Sunday
Florida. Reconnaissance at Santa Rosa Island ended.
Louisiana: After 52 years of service in the United States Navy, Lieutenant Lawrence Rousseau was the highest-ranking US Navy officer to resign and offer his services to the South. His resignation was accepted by the US Navy Department and became effective on 11 February 1861. His backdated commission as a Captain in the Confederate States Navy made him the highest-ranking officer of the Confederate States Navy until 1862 when his junior, Franklin Buchanan, was promoted to the rank of Admiral. Rousseau assumed command of the Mississippi River Naval Squadron. where he helped to fit out commerce raiders while attempting to organise the naval defence of New Orleans and the Mississippi River.
Virginia. US Secretary of the Navy Gideon Welles ordered 250 men to be transferred from New York to strengthen the garrison of the Norfolk Navy Yard.
Texas. Fort Bliss was abandoned and surrendered to pro-Confederate forces.
Union Organisation
Commander in Chief: President Abraham Lincoln
Vice-President: Hannibal Hamlin
Secretary of War: Simon Cameron
Secretary of the Navy: Gideon Welles
African Squadron: William Inman
Brazil Squadron: Joshua Ratoon Sands
East Indian (Asiatic) Squadron: Cornelius Kinchiloe Stribling
European Squadron: vacant
Home Squadron: Garrett J Prendergast
Mediterranean Squadron: Charles H Bell
Pacific Squadron: John Berrien Montgomery
General–in-Chief: Winfield Scott
Department of the East: John Ellis Wool
Department of New Mexico: William Wing Loring
Department of the Pacific: Albert Sidney Johnston interim, Edwin Vose Sumner awaited
- District of Oregon: George Wright
Department of Texas: Carlos Adolphus Waite
Department of Utah: Philip St George Cooke
Department of the West: William Selby Harney
Confederate Organisation
CSA: Lieutenant Lawrence Rousseau CSN assumed command of the Mississippi River Naval Squadron.
Commander in Chief: President Jefferson Finis Davis
Vice-President: Alexander Hamilton Stephens
Secretary of War: Leroy Pope Walker
Secretary of the Navy: Stephen Russell Mallory
“Department of Louisiana”: David Emanuel Twiggs
- “Forces in New Orleans” “Army of Louisiana”: Braxton Bragg
Department of South Carolina: Pierre Gustave Toutant Beauregard
- “Forces in Charleston”: Pierre Gustave Toutant Beauregard
Department of West Florida: Braxton Bragg
- “Forces in Pensacola”: Braxton Bragg
Union Generals
Major-General USA
Winfield Scott
Brigadier-General USA
John Ellis Wool
William Selby Harney
Edwin Vose Sumner
Brigadier-General USA (Staff)
Joseph Eggleston Johnston
Confederate Generals
Major-General PACS
David Emanuel Twiggs
Brigadier-General ACSA
Pierre Gustave Toutant Beauregard
Braxton Bragg