The only thing I can imagine is they were trying to get England to come into the war on their side. They may well have done it until Lincoln issued the Emancipation Proclamation, which would have put England on the side of slavery. The English people would not have stood for that.
They wanted the aid of Great Britain and they believed England would support them because the South sold most of their cotton to England. But, England found cotton in the Middle East and did not suffer from the loss of Southern cotton. Then, the Confederacy wanted to keep England neutral but the Emancipation prevented that because England had already outlawed slavery.
It made it hard for foreign nations to recognize and support the confederacy
Privateering had been outlawed in 1856 by most European powers. However, the British Proclamation of Neutrality in May of 1861 effectively gave the Confederacy defacto recognition but diplomatic ties were not created. Based on this the British expected the South to abide by the treaty against privateering.
Technically, Great Britain remained neutral during the US Civil War. The Confederacy did all it could on a diplomatic basis to gain recognition from Great Britain.
A diplomatic what?
Fort Henry and Fort Donelson were forts that protected the Tennessee and Cumberland Rivers. These rivers were important water routes into the Western Confederacy. All has to do with the Union's strategy, and part of Anaconda which stated: 1. Blockade the coast 2. Take the Mississippi thus splitting the south into two 3. Capture Richmond because it was the seat of power/capital and 4. Drive through Tennessee because it's the heart of the Confederacy. The Objective was to basically blockade the coast and drive through Tennessee because it's the heart of the Confederacy. To win the battle verse the Confederate Union.
to prevent European nations from recognizing the Confederacy.
England
The primary Mission of the State Department is Diplomacy
It made it hard for foreign nations to recognize and support the confederacy
forestalling foreign powers from granting diplomatic recognition to the confederacy
The South's objective for the War Between the States was to preserve the Confederacy, which was their govenment, and thus govern themselves rather than be governed by the North.
To declare war with another country is to sever diplomatic relations and prepare to use military force to obtain your objective.
The European countries wait to help the confederacy. All because Jefferson Davis thought the cotton textile company would lead o a diplomatic recognition and mediation or military intervention.
During the US Civil War the Union sought the complete destruction of the Confederacy's government. This objective had no limits. On the other hand, the Confederacy had a more limited objective. The South did not fight for the destruction of the United States. They sought to secede and become an independent nation.
The only foreign nation that recognised the Confederacy was Mexico. There was also some diplomatic dialogue with Puerto Rico (or it may have been Costa Rica).
A diplomatic campaign to keep the four border-states from joining the Confederacy. Issuing the Emancipation Proclamation, to keep the British and French from granting recognition to the Confederacy. Promoting U.S. Grant to General-in-Chief.
To carry the war to the North, fight a defensive battle and force the Yankees to destroy themselves attacking them, as at Fredricksburg.