1. Back up your claim.
...
*sigh*
I'll keep reposting as many times as it takes to get through.
The first shots were fired in
January of 1861.
Buchanan was President and he was trying to resupply Sumter.

Click to enlarge
The South fired upon the Union Steamship Star of the West
They took another ship and seized it: "The Marion."
Then converted her to a Man of War ship.
THE STEAMSHIP "MARION." ; SEIZED BY THE STATE OF SOUTH CAROLINA TO BE CONVERTED INTO A MAN-OF-WAR.
Star of the West
Note the date on the Harpers Weekly newspaper:
January, 1861, linked above.
==============
Further, another Timeline for you, from the SC Convention forward:
December 20, 1860: South Carolina convention passes ordinance of secession.
December 24, 1860:
Mississippi Senator Jefferson Davis introduces a "compromise" proposal which would effectively make slavery a national institution.
December 26, 1860: Major Anderson moves Federal garrison in Charleston, SC, from Fort Moultrie to Fort Sumter.
January 3, 1861: G
eorgia seizes Fort Pulaski. <---NOTE: THEY SEIZED THE FORT BEFORE THEY SECEDED.
January 4, 1861:
Alabama seizes U.S. arsenal at Mount Vernon. <---NOTE: THEY SEIZED THE FORT BEFORE THEY SECEDED.
January 5, 1861:
Alabama seizes Forts Morgan and Gaines.
<---NOTE: THEY SEIZED THE FORT BEFORE THEY SECEDED.
January 6, 1861:
Florida seizes Apalachicola arsenal. <---NOTE: THEY SEIZED THE ARSENAL BEFORE THEY SECEDED.
January 7, 1861:
Florida seizes Fort Marion.
<---NOTE: THEY SEIZED THE FORT BEFORE THEY SECEDED.
January 8, 1861: Floridians try to seize Fort Barrancas but are chased off.
January 9, 1861: Mississippi secedes.
Star of the West fired on in Charleston Harbor <-- FIRING ON A SHIP - A CLEAR ACT OF WAR
THE STEAMSHIP "MARION." SEIZED BY THE STATE OF SOUTH CAROLINA TO BE CONVERTED INTO A MAN-OF-WAR.
January 10, 1861: Florida secedes.
Louisiana seizes U.S. arsenal at Baton Rouge, as well as Forts Jackson and St. Philip.
January 11, 1861: Alabama secedes.
Louisiana seizes U.S. Marine Hospital.
January 14, 1861:
Louisiana seizes Fort Pike. <---NOTE: THEY SEIZED THE FORT BEFORE THEY SECEDED.
January 19, 1861: Georgia secedes.
January 26, 1861: Louisiana secedes.
January 28, 1861: Tennessee Resolutions in favor of Crittenden Compromise offered in Congress.
February 1, 1861: Texas secedes.
February 8, 1861: Provisional Constitution of the Confederacy adopted in Montgomery, AL.
Arkansas seizes U.S. Arsenal at Little Rock.
February 12, 1861:
Arkansas seizes U.S. ordnance stores at Napoleon.
February 18, 1861: Jefferson Davis inaugurated as President of the Confederacy.
March 4, 1861: Abraham Lincoln inaugurated as 16th President of the United States.
March 21, 1861: "Cornerstone speech" delivered by Alexander Stephens. (This is where the Confederate V President lays it out clearly: Slavery is the Cornerstone of the Confederacy.)
April 12, 1861:
Fort Sumter fired upon by Confederates.
THE WAR OFFICIALLY BEGINS.