No. By the time of the invasion of Normandy the Soviet Union had been at war with Germany for three years. During all those three years the Soviet Union had been carrying, alone, the vast majority of the burden of ground combat against Germany. US and British operations in Africa, Sicily and Italy never occupied more than 10% of Germany's war effort. The Russians had been, and continued to do all the heavy lifting. The invasion of Normandy was to open a second front against Germany, and drain off strength from Germany's fight with Russia. It was also to prevent the Soviets from completely dominating all of Europe, once they had defeated Germany. But even after all the American and British and Allied forces were ashore in the west and engaged with the Germans, the Russians continued to occupy two-thirds of the German war machine.
Most of them didn't, and it was not seen as a war on slavery at all, until Lincoln made this official with the Emancipation Proclamation.
The union of the Parliaments of England and Scotland in 1707.
That was the Emancipation Proclamation. It could not, of course, free any slaves in the Confederate states because Lincoln carried no authority there. It was really a signal to Britain and France that the war had been turned into an official crusade against slavery, and they could not send military aid to the Confederacy without looking pro-slavery themselves.
It was another battle during the civil war, and battles happen for defense and offense of the land. The South fought an defensive war (besides Gettysburg), and the Union was figthing to preserve itself, not only against slavery. It was a battle that occured in the South (the only northern battle was in Gettysburg, Pennsylvania), and the Northy was trying to weaken the south. Most thought that the war was going ot take less than a year, and the North was trying ot meet that goal while trying ot preserve the Unioin as a whole.