What did the Confederate(CSA) Government do wrong.

I dont think it was something they did wrong, rather it was what Lincoln did right.
He kept the border states of Delaware and Maryland and Kentucky and Missouri in the Union even though these were slave states.

He employed Federal troops and martial law.
The Dupont powder mills of Delaware , the iron works of Maryland and the northern ports in the Delaware and Chesapeake bays would have been relly important to the south.

Lincoln didnt fire the first shot and he didnt insist that he was trying to free the slaves (although the Confederacy began as a monument to slavery). If he did, MAryland Delaware kentucky and Missouri would have seceeded

Theres a number of things that the Confedercy did during the war that were "Tactical" blunders but strategic blunders and shortcomings were what determined whether the south hd any chance at all.

Their overall strategy was to fight a war that suitably confounded the North so that the Confederacy could honorably "sue for peace" and be recognized as a separate country.
Lincoln would have nothing but unconditional surrender and he almost lost his ass as it got close to the 1864 elections were it not for

1. Grant and his relentless battles of attrition at Spotsylvania, the wilderness Port Anna,Cold HArbor etc

2. and timely victories by Sherman in the ALtlanta Campaign that together , in essence guaranteed that the North, and Lincoln's reelection , and overall strategy , would
prevail

oh look, it's another carolgreen!

did you forget the log-ins to the other accounts?

I've always considered Vicksburg as decisive. Once the Mississippi River became the povence of the North, the South was divided into East and West, and had lost a major means of resupply--the war after that became attrition.

It helped that Lincoln recognized Grant as a pitbull and that Grant and Sheman had the foresite to spend a weekend in Cincinnati to plan the rest of the war.

Rap

The south have a fraction of the free population of the north and a fraction of the industrial resources needed to fight a war after the industrial revolution.

The CSA first and most important bad move was to try to break free of the union by force.

I agree, there were so many battles that ere decisive in one category or another. What I was getting at was that the Spottsylvania/ Wilderness and the fall of Atlanta ere decisive for LINCOLN. In august of 1864 he was as vulnerable as he could be to losing the election. BUT as soon as Grant and Sherman sent up some nice news, everything changed.

Grant wasnt made General of theARmy till March 1864 a year after the Fall of Vicksburg.

Thats why the border states stuck in the Union, ANd recallm Virginia and te Carolinas didnt secede till AFTER the fort Sumter shelling

Nine Months--Vicksburg fell on the same weekend as Gettysburg (July 2,3,4, 1863). After Vicksburgs Grant went east to through Tennessee where he kicked Buell and Bureaguard's butts at Nashville and Chickamonga (sp).

This post Vicksburg activity demonstrated Grants genius at logistics, earning him his promotion to GOtheA.

Rap

In a nutshell, the CSA underestimated the north's capabilities and overestimated their own. They also counted on British support and they didn't get it.

They did a boycott of their cotton crop to try to force the UK into becoming involved and what they should had done instead is to shipped as must as possible of their cotton crop and used the funds to buy as must war materials as possible before the north got their blockade in order.

Im not disagreeing with you, but Grant didnt "Take command" as General of the ARmy until a year (almost) after Vicksburg and Lincoln was probably going down in defeat in the election until Grants war of attrition and Shermans march to the sea in AUG 1864 helped Lincoln win the election and drive the point home of unconditional surrener and "NO" suing for peace.
Remember this stuff culminated in early 1865 with Sheridan hitching up with Grant and pressing the Petersburg siege an the last struggle that led to Appomatox (Even though Johbston didnt surrender till May 1865 and Stand Wadie nd The TrnsMississippi went on till July)