The south fired on the fort to repel the invasion.
If you'd bother to read history, rather than regurgitate public school nonsense you'd know...I hope others reading this WILL go look for themselves..you continue to rely on emotion and anti southern bias...
Do a search.. "why did lincoln send ships to charleston in 1861"
I do read history, and I ask again, what invasion? Major Anderson's troops were sitting in a federal fort and the ships (that never arrived, I might add) were bound for the same. No one invaded Charleston.
Here's what the newspapers and the letters and writings of the people actually involved said at the time. This is all researchable; Attempt to deny them at your own risk, son.
"But what am I to do in the meantime with those men at Montgomery [meaning the Confederate constitutional convention]? Am I to let them go on... [a]nd open Charleston, etc., as ports of entry, with their ten-percent tariff. What, then, would become of my tariff?" ~ Lincoln to Colonel John B. Baldwin, deputized by the Virginian Commissioners to determine whether Lincoln would use force, April 4, 1861.
Okay, and? It's the duty of the President to enforce the laws of the Union.
"Union means so many millions a year lost to the South; secession means the loss of the same millions to the North. The love of money is the root of this as of many other evils....The quarrel between the North and South is, as it stands, solely a fiscal quarrel"
.... Charles Dickens in a London periodical in December 1861
"The contest is really for empire on the side of the North and for independence on that of the South....". ..... London Times of 7 Nov 1861
Britain's government was eager for the United States to falter so that they could resume colonization of the Americas. That you cite British editorials shows a lot about your opinion of empire.
"Slavery is not the cause of the rebellion ....Slavery is the pretext on which the leaders of the rebellion rely, 'to fire the Southern Heart' and through which the greatest degree of unanimity can be produced....Mr. Calhoun, after finding that the South could not be brought into sufficient unanimity by a clamor about the tariff, selected slavery as the better subject for agitation"
..... North American Review (Boston October 1862)
If slavery was what brought unanimity to the South so that they could have a rebellion, then slavery was the cause of the rebellion. Not to mention that the Confederate leaders all came right out and said that slavery was the cause of the rebellion (see the OP for numerous citations) and I think they know why they were doing what they did better than some dude in Boston.
"They [the South] know that it is their import trade that draws from the people's pockets sixty or seventy millions of dollars per annum, in the shape of duties, to be expended mainly in the North, and in the protection and encouragement of Northern interests....These are the reasons why these people [the North] do not wish the South to secede from the Union."
..... New Orleans Daily Crescent 21 January 1861
"In one single blow our foreign commerce must be reduced to less than one-half what it now is. Our coastwise trade would pass into other hands. One-half of our shipping would lie idle at our wharves. We should lose our trade with the South, with all of its immense profits. Our manufactories would be in utter ruins. Let the South adopt the free-trade system, or that of a tariff for revenue, and these results would likely follow." .... Chicago Daily Times December 1860
"At once shut down every Southern port, destroy its commerce and bring utter ruin on the Confederate States." ..... NY Times 22 March 1861
"the mask has been thrown off and it is apparent that the people of the principal seceding states are now for commercial independence. They dream that the centres of traffic can be changed from Northern to Southern ports....by a revenue system verging on free trade...." .... Boston Transcript 18 March 1861
So? The people doing the seceding know their motives better than some dudes in the North.
"You and I both anticipated that the cause of the country would be advanced by making the attempt to provision Fort Sumter, even if it should fail ; and it is no small consolation now to feel that our anticipation is justified by the result. "
Abraham Lincoln, in a letter to Gustavus Fox, May 1, 1861
"The affair at Fort Sumter, it seems to us, has been planned as a means by which the war feeling at the North should be intensified, and the administration thus receive popular support for its policy.... If the armament which lay outside the harbor, while the fort was being battered to pieces [the US ship The Harriet Lane, and seven other reinforcement ships], had been designed for the relief of Major Anderson, it certainly would have made a show of fulfilling its mission. But it seems plain to us that no such design was had. The administration, virtually, to use a homely illustration, stood at Sumter like a boy with a chip on his shoulder, daring his antagonist to knock it off. The Carolinians have knocked off the chip. War is inaugurated, and the design of the administration accomplished." ~ The Buffalo Daily Courier, April 16, 1861.
No one made the traitors open fire. Lincoln did not stand there at the cannons and lay match to powder hole.
"We have no doubt, and all the circumstances prove, that it was a cunningly devised scheme, contrived with all due attention to scenic display and intended to arouse, and, if possible, exasperate the northern people against the South.... We venture to say a more gigantic conspiracy against the principles of human liberty and freedom has never been concocted. Who but a fiend could have thought of sacrificing the gallant Major Anderson and his little band in order to carry out a political game? Yet there he was compelled to stand for thirty-six hours amid a torrent of fire and shell, while the fleet sent to assist him, coolly looked at his flag of distress and moved not to his assistance! Why did they not? Perhaps the archives in Washington will yet tell the tale of this strange proceeding.... Pause then, and consider before you endorse these mad men who are now, under pretense of preserving the Union, doing the very thing that must forever divide it."
~ The New York Evening Day-Book, April 17, 1861.
Well, do the archives in Washington tell that tale? They didn't attack the Charleston batteries because it would have been suicidal; the batteries surrounding Charleston Harbor were designed to repel British battle fleets, which the flotilla of supply ships sent to Sumter were not. They'd have been sunk with all hands had they tried to enter the harbor.