Answer:
The battle of the Wilderness lasted from May 4, until May 7, 1864.
It was indecisive and practically led to a stalemate.
At night of that day Grant's Army, instead retreating northward to Germanna Ford, set out southward advancing toward the heart of the enemy country, giving but little importance to its line of communication.
Taking that decision Grant took aback his opponent, Lee, who was somewhat outbalanced by the unexpected movement. And he then was able but only by a hair's breadth to prevent Grant's Army from interposing between his Army and Richmond.